If you have a flashing check engine light, turn off the engine immediately to prevent potential motor damage. Verify the correct DRBIII PEP module pressure transducer is being used It is critical when reading pressures with the DRBIII PEP module pressure transducers that the proper transducer is being used. In PCM VIN is not programmed in the control module EEPROM. Repair Urgency: Get this code fixed as soon as possible to avoid further damage to your emission system and possible engine damage. Engine does not reach operating temperature. Decrease Engine Performance Due To High Intake Air Temperature. Voltage greater than 3.76 volts (4-speed auto. Transmission Range Sensor Circuit Malfunction (PRNDL Input), Transmission Range Sensor Circuit Range/Performance, Transmission Range Sensor Circuit Low Input, Transmission Range Sensor Circuit High Input, Transmission Range Sensor Circuit Intermittent, Transmission Fluid Temperature Sensor Circuit, Transmission Temperature Sensor No Temperature Rise After Start. trans. Check here. MODELS: 2014 - 2016 (KL) Jeep Cherokee NOTE: This bulletin applies to vehicles within the following markets/countries: NAFTA. trans. Immediate service is required. O2 Sensor Circuit Malfunction (Bank 1 Sensor 2), O2 Sensor Circuit Low Voltage (Bank 1 Sensor 2), O2 Sensor Circuit High Voltage (Bank 1 Sensor 2), OS Sensor Circuit Slow Response (Bank 1 Sensor 2), O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 2). Probable defective Crank Sensor. Evaporative Emission Control System Purge Control Valve Circuit Open, Evaporative Emission Control System Purge Control Valve Circuit Shorted, Evaporative Emission Control System Vent Control Circuit, Evaporative Emission Control System Vent Control Circuit Open, Evaporative Emission Control System Vent Control Circuit Shorted, Evaporative Emission Control System Vent Valve/Solenoid Circuit, Evaporative Emission Control System Pressure Sensor, Evaporative Emission Control System Pressure Sensor Range/Performance, Evaporative Emission Control System Pressure Sensor Low Input, Evaporative Emission Control System Pressure Sensor High Input, Evaporative Emission Control System Pressure Sensor Intermittent, Evaporative Emission Control System Leak Detected (large leak), A large leak has been detected in the evaporative system. Ignition Coil E Primary/Secondary Circuit, Ignition Coil F Primary/Secondary Circuit. Within the last 50 starts, the majority of them have been successful. 1995-2023, Quadratec, Inc. All rights reserved. Oxygen sensor input voltage sustained above normal operating range. Also, possible faulty or loose gas cap. Jeep Grand Cherokee WJ Diagnostic Codes in Detail Here is a more detailed explanation of Jeep Grand Cherokee WJ codes. The ignition can also be switched on and off during a hard reset. What Does Jeep Code P0420 Mean? Incorrect input state detected for the Park/Neutral switch. Use FIXD to s can your vehicle to verify P0128 is the only code present. Speed control switch input above maximum acceptable voltage. This will also clear the codes and turn off the check engine light. [ VW ]. Labor: 1.0. trans. No CCD/J1850 messages received from the Mechanical Instrument Cluster (MIC) Module. DTCs are automatically erased following 40 warm-up cycles if the component does not fail again. Loss of 5v feed to the EGR position sensor. Did you know that you don't need an Scanner Tool to read OBDII codes in a Jeep? 49 people found this helpful. The system is designed to read and clear trouble codes, as well as provide real-time data about the vehicles systems and components. An open or shorted condition detected in the A/C clutch relay control circuit. Camshaft Position Sensor A Circuit (Bank 1 or Single Sensor). Camshaft Position Sensor A Circuit Range/Performance (Bank 1 or Single Sensor), Camshaft Position Sensor A Circuit Low Input (Bank 1 or Single Sensor), Camshaft Position Sensor A Circuit High Input (Bank 1 or Single Sensor), Camshaft Position Sensor A Circuit Intermittent (Bank 1 or Single Sensor). No communication detected between co-processors in the control module. Fuel Level Sensor Circuit Range/Performance. In PCM SKIM secret key is not programmed in the control module EEPROM. The MAP should be set to P1298 when starting the lean operation at the widest open position. Another way is to disconnect the battery for a few minutes. OBD-II equipped vehicles have a connector located in the passenger compartment, usually accessible from the drivers seat (under the dash above the hood release lever in the Grand Cherokee WJ). . Do I need to something since I unhooked the computer? Governor Pressure Above 3 PSI In Gear With 0 MPH. High Speed Radiator Fan Ground CTRL Relay Circuit. Web 2014 jeep grand cherokee 3.6 l firing order solved: There Are Quite A Few Things That Can Cause The P0306 Trouble Code To. Check out this video to find out how!Wan. MAP sensor input above maximum acceptable voltage. After replacing the leak sensor and o-ring like the web suggested it did not fix the issue. (was P0139), Radiator Temperature Sensor Volts Too High. Engine coolant temperature sensor input above the maximum acceptable voltage. Codes: P0052, P0123, P0222, P0335, U1424. An open or shorted condition detected in the ASD relay control circuit. Relationship between engine and vehicle speeds indicated failure of torque convertor clutch lock-up system (TCC/PTU sol). Danno Feb 20, 2014. No CCD/J1850 messages received from the Climate Control Module (CCM). By turning on the ignition in your vehicle, you can activate it. A DTC is the result of a system or circuit failure, but it does not directly identify the component or component that failed. The OBD II connectors are usually located in the passenger compartment of the Grand Cherokee (in the dashboard under the hood release lever). No RPM Signal to PCM (Crankshaft Position Sensor Signal to JTEC). This system works hand in hand with your vehicle's traction control system to help you control your vehicle in dangerous conditions. Transmission Temperature Sensor Voltage Too Low. Fault codes are typically displayed after the Check Engine light illuminates. Energizing Heated Air Intake does not change intake air temperature sensor an acceptable amount. trans. Sensor Circuit Malfunction (Bank 1 Sensor 3), O2 Sensor Circuit Low Voltage (Bank 1 Sensor 3), O2 Sensor Circuit High Voltage (Bank 1 Sensor 3), O2 Sensor Circuit Slow Response (Bank 1 Sensor 3), O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 3), O2 Sensor Heater Circuit (Bank 1 Sensor 3), O2 Sensor Circuit Low Voltage (Bank 2 Sensor 1), O2 Sensor Circuit High Voltage (Bank 2 Sensor 1). An open or shorted condition detected in the short runner tuning valve circuit. Reconnect the negative battery cable. The vehicle must be repaired before any emissions test can be performed. A malfunctioning gas cap or a defective emissions control system component can cause the fault code. Catalyst Temperature Sensor Circuit Shorted Low. Ill do my best to share my vast knowledge about anything related to Jeep cars & models. The indicator remains controlled and illuminated by the cluster until a valid lamp-on or lamp-off message is received from the PCM. If there is fuel in the purge canister check ORVR (on-board refueling vapor recovery) system per service manual section 25. Open circuit between PCM and fuel gauge sending unit. [ Mack ] [ Mahindra ] [ Mazda ] [ Mercedes-Benz ] [ Mercury ] Ignition Key Off Timer Performance Too Fast, Ignition Key Off Timer Performance Too Slow, Manifold Tunning Valve Control Performance, Viscous/Cabin Heater Relay Circuit Condition, Decreased engine performance -high intake air temperature, Wiring open circuit/short to positive, ground wire defective, IAT sensor, ECT sensor, cooling system, high engine bay temperature, ECM, Intake Air Temperature Sensor Circuit Intermittent Low Voltage, Enginecoolant temperature (ECT) sensor/intake air temperature (IAT) sensor signal variation, Closed loop fuel control not achieved -bank 1, Wiring,H02S, fuel system, MAP sensor, ECM, Closed loop fuel control not achieved -bank 2, Wiring, H02S, fuel system, MAP sensor, ECM, Vacuum Reservoir Solenoid Circuit Condition, Fuel Rail Pressure Malfunction Positive Pressure Deviation, Fuel Rail Pressure Malfunction Positive Volume Deviation, Fuel Rail Pressure Malfunction Pressure Drop In Over-run, Fuel Rail Pressure Malfunction Maximum Positive Deviation, Fuel Rail Pressure Malfunction Positive Deviation Fuel Pressure Solenoid Setpoint, Fuel Rail Pressure Malfunction Negative Deviation Fuel Pressure Solenoid Setpoint, Fuel Rail Pressure Malfunction Rail Pressure Is Too Low, Fuel Rail Pressure Malfunction Rail Pressure Is Too High, Throttle Inlet Pressure Sensor Performance, Intake air temperature (IAT) sensor -voltage low, Intake air temperature (IAT) sensor-voltage high, Heated oxygen sensor (H02S),heater control-circuit malfunction, Heated oxygen sensor (H02S) 1, bank 1 slow response, Wiring, heating inoperative, exhaust leak, H02S, Heated oxygen sensor (H02S) 1, bank 2 slow response, Wiring, heating inoperative, exhaust leak,H02S, Heated oxygen sensor (H02S) 2, bank 1slow response, Vacuum Reservoir Solenoid Short To Ground, Wiring, intake manifold aircontrol actuator, ECM, AlC compressor clutch control circuit 2 (PCM) circuit high, AlC compressor clutch controlcircuit 2 (PCM) over-current, Wiring, AlC compressor clutch, poor connection, PCM, Starter control circuit 2 (PCM) -short circuit to ground, Starter control circuit 2(PCM)-shortcircuitto positive, Startercontrolcircuit 2(PCM) -open circuit, Starter control circuit 2 (PCM) over-current, Wiring, poor connection, starter motor, PCM, Fuel pump controlcircuit2(PCM)-short circuit to ground, Fuel pump control circuit2 (PCM)-short circuittopower, Fuel pump control circuit 2(PCM) -open circuit, Fuel pump control circuit 2(PCM)over-current, Wiring, coolingsystem,coolant thermostat, ECTsensor, Fuel pump relay -wiring open/short circuit, Intake manifold air control solenoid(shortrunner) -wiring open/short circuit, Wiring, intake manifold air control solenoid (short runner), Intake manifold air control solenoid-wiring open/short circuit, Wiring,intake manifold air control solenoid, Idle speedcontrol (ISC)system -rpm lower/higher than expected, Wiring, air leak, throttle valve tight/sticking,lAC valve, Throttle position (TP) sensor-no 5 volt supply, Manifold absolute pressure(MAP)sensor no 5 volt supply, Systemtoolean-at prolonged wide open throttle, Intake/exhaust leak,MAP sensor,fuel pressure/pump, injector(s), H02S, Manifold absolute pressure (MAP) sensor/throttle position(TP)sensor, Intakeleak,hose connection(s),MAP sensor, TP sensor, Engine controlrelay -wiringopen/short circuit, Engine control relay-wiring open circuit, Crankshaft position(CKP)sensor/camshaft position(CMP)sensor-signal synchronisation, Timing belt loose/jumped position, CKP sensor, CMP sensor, Crankshaft position (CKP) sensor/camshaft position (CMP) sensor -intermittentsignal, Wiring,poor connection, air gap, CKP sensor, CMP sensor, Engine control module (ECM)-misfire detection limit reached, Manifold Differential Pressure sensor condition, Exhaust gas recirculation(EGR)valve position sensor no 5 volt supply, Exhaust gas recirculation (EGR) valve position sensormalfunction, Wiring, exhaust gas recirculation (EGR) valve,ECM, Wiring, cylinder cut-out solenoid, oil pressure, ECM, Wiring, cylinder cut-outsolenoid,oil pressure,ECM, Wiring, cylindercut-out solenoid,oil pressure, ECM, Wiring, cylinder cut-outsolenoid,oil pressure, ECM, Diesel particulate filter (DPF)-performance, Wiring, exhaust, DPF pressure differential sensor,DPF, hose, Diesel particulate filter(DPF)pressure differential sensor hose performance, Diesel particulate filter(DPF)pressure differential sensor -hose blocked, Diesel particulatefilter (DPF)pressure differential sensor -flow too high, Wiring, exhaust, DPF pressure differential sensor, DPF, hose, Engine control module(ECM)-auxiliary 5 voltoutput high, Secondary air injection (AIR) system -insufficientflow detected, Secondary airinjection(AIR) system-excessive flow detected, Positive crankcase ventilation (PCV) solenoid-wiring open/short circuit, Transmission control module (TCM)-misfire detection, Catalytic converter temperature sensor -low input, Wiring short circuit to ground, catalytic converter temperature sensor, ECM, Catalytic convertertemperaturesensor,high input -wiring short circuit to positive, Wiring, catalytic converter temperature sensor, ECM, Wiring, engine misfire, catalytic converter, catalytic converter temperature sensor, Secondary air injection (AIR) solenoid-circuit malfunction, Evaporative emission (EVAP) system blockage detected, Hose connection(s),hose blocked/trapped, EVAP canister, Engine coolant blower motor relay,high speed -wiring open/short circuit, Wiring,engine coolant blowermotor relay (high speed), Engine control module (ECM) -auxiliary 5 volt output low, AlC condenser blower motor relay, high speed-wiring open/short circuit, Wiring, engine coolant blower motor relay (high speed), Engine coolant blower motor relay,low speed-wiring open/short circuit, Wiring, engine coolantblower motor relay (low speed), Enginecoolantblowermotor relayopen/shortcircuit, Ambient/batterytemperature sensor-voltage high, Wiring, ambient/battery temperature sensor, Ambient/battery temperature sensor-voltagelow, Evaporativeemission (EVAP) leakdetectionpump -pressure switch, Wiring, hose leak/blockage, EVAP leak detection pump, Evaporative emission(EVAP) leakdetection pumpsolenoid-wiring open/shortcircuit, Wiring, hose leak/blockage, EVAP leak detection pump solenoid, Engine control module (ECM) -5volt outputlow, Enginecoolant blower motorrelay,highspeed 3 -wiringopen/shortcircuit, Wiring, engine coolant blower motor relay (highspeed3), Enginecoolant blower couplingsolenoid-wiring open/shortcircuit, Wiring, engine coolant blower coupling solenoid, Vehicleover-speedcondition -rear axle speed greater than frontaxle, Vehicle over-speed condition -frontaxlespeed greater than rear axle, Wiring, connectors,oil quality, oil level, Oil Pressure Out Of Range Camshaft Advance / Retard Disable, Brake pedalposition(BPP) switch -circuit malfunction, BPP switchadjustment, wiring, BPP switch, Brake pedal position (BPP) switch -circuit malfunction, Cruise control system,multi-functioninput Acircuit stuck, Wiring, poorconnection, multi-function switch, mechanical fault, ECM, Cruise control-wiring open/short circuit, Wiring, hoses, cruise control master switch,cruisecontrol vacuum switching valve, Cruise controlmasterswitch -high voltage, Cruise controlmaster switch -low voltage, AlCrefrigerantpressure sensor-highinput, Wiring, AlC refrigerant pressure too high (coolingfault/incorrectlycharged), AlCrefrigerantpressure sensor, AlC refrigerantpressuresensor -low input, Wiring, AlC refrigerant pressure toolow(incorrectlycharged), AlC refrigerant pressure sensor, Engine control module (ECM)notprogrammed, New ECM notprogrammed, incorrectly programmed, ECM, Engine control module (ECM) -RAMread/writeerror, Engine control module (ECM) -shutdowntimer error, Engine control module (ECM) -primary 5 volt output erratic, Wiring, poor connection, oil pressure sensor, APP sensor, CKP sensor, throttlecontrolunit, TPS sensor, ECM, Engine control module (ECM)-auxiliary 5 volt output erratic, Wiring, poorconnection, APP sensor, CMP sensor,EGR solenoid, EGR valve position sensor, MAP sensor, ECM, Engine coolant hydraulic blower motor solenoid/circuithigh-circuit malfunction, Wiring,fuse, engine coolant hydraulicblowermotorsolenoid,ECM, Engine coolant hydraulic blowermotorsolenoid/circuit low-circuitmalfunction, Wiring, fuse, engine coolant hydraulic blower motor solenoid,ECM, Glow plug control module/supply circuit circuit malfunction, Glow plug control module/supply circuitcircuit malfunction, Data bus,engine control module (ECM)/transmission control module(TCM)-no communication, Clutch pedal position(CPP)switch -circuit malfunction, Wiring, battery, alternator drive belt,alternator, Wiring, cruise control vacuum switchingvalve, Engine control module (ECM)-supply voltage disconnected withinlast50ignitionswitch ON-OFF cycles, Key not programmed into immobilizer control module, Wiring, ignition key notmatched/damaged, immobilizer control module, CAN data bus,immobilizer control module no signal, Wiring, instrumentation control module (mechanical), Internal Fuel Injection Pump Controller Failure, No Communication Between ECM and Injection Pump Module Data, Fuel Injection Pump CKP Sensor Does Not Agree With ECM CKP Sensor, Fault detectedinengine control module(ECM), Fault detected in companion engine control module(ECM), Engine control module (ECM) -EEPROMerror, CAN data bus,AlC control module-no signal, Other trouble code(s) stored, transmission fluid level,transmission shift linkage adjustment D, Skip shiftsolenoid -wiringopen/short circuit, Transmission-gear/input speed/output speedratioerror, Transmission fluid level,wiring, input shaft speed (ISS) sensor,output shaft speed(055)sensor, transmission mechanical fault, Torque converterclutch (Tee)/overdrivesolenoid-performance problem, TCC, overdrive solenoid,transmission mechanical fault, Governor pressure not equalto target (15-20PSI)-mid pressure malfunction, Signal wire open/shortcircuit,valve body, sensor supply wire open circuit,transmission fluid level, governor pressure solenoid, transmission mechanical fault, ECM -no 5 volt supply, Govemor pressurenotequalto target (15-20PSI) -zero pressure malfunction, Signal wire open/short circuit,valve body, sensor supply wire open circuit,transmission fluid level, governor pressure solenoid, transmission mechanical fault,ECM -no 5 volt supply, Govemor pressure sensor-incorrectsignal, Signal wire shortcircuit to ground/positive, supply wire open/short circuit, transmission fluid level, governor pressure solenoid, governor pressure sensor, ECM, Signal wire shortcircuit to positive, supply wire open circuit, transmission fluid level, governor pressure sensor, ECM, Signal wire short circuit to ground, supply wire open circuit, transmission fluid level,governor pressure sensor, ECM, Transmission system relay-wiringopen/short circuit, Solenoid switch valve locked in Tee(torqueconverterclutch)position-wiringopen/shortcircuit, Wiring, transmissionsystem relay, transmission fluid level low, UR pressure switch,solenoid switch valve, Solenoid switchvalve lockedinUR(low/reverse) position-wiringopen/shortcircuit, Wiring, transmission system relay,transmission fluid level low, UR pressure switch, solenoid switch valve, Speed ratio error, transmission mechanical fault, Torque reductioncommunicationerror-wiring open/short circuit, Transmissionspeedsensor-groundcircuit, Wiring open circuit, TCM, inputshaft speed (ISS) sensor, output shaft speed(055)sensor, Wiring,transmission fluid level low,transmission cooling fan -if fitted,transmission fluid temperature (TFT) sensor, Clutch pedal position(CPP)switch override relay-circuit malfunction, Wiring open circuit/short to ground, damaged fuel tank, fuellevelsender, Park/neutral position (PNP)switch-inputcircuit malfunction, Fire Prevention System Crash Event Detected, Car Had An Accident And The Inertia Switch Has Operated, Controller area network (CAN) databuscommunication malfunction, Wiring, steering columncontrol module, multifunction control module, ECM, Controller area network (CAN)databus communication malfunction, Wiring,fuellevel sensor, multifunction control module, ECM, Outside air temperature sensor communication malfunction, Wiring, outsideair temperature sensor, multifunction control module, ECM, Wheel speed sensor-communication malfunction, Wiring, speed sensor, anti-lock brake system(ABS) controlmodule, ECM, Controllerareanetwork (CAN) databuscommunication malfunction, Wiring,multifunctioncontrol module, ECM, AlC pressure sensor -communication malfunction, Wiring, multifunction control module,ECM, Wiring,speed sensor,anti-lock brake system (ASS) control module,ECM, Control area network(CAN)data bus-fuellevel -signal implausible, Wiring,instrument panel,multifunction control module, ECM, Controller area network(CAN)data bus/fuel level -communication malfunction, Wiring, instrumentation control module,multifunction control module,ECM, Wheel speed sensor-CAN data communication malfunction, Wiring,wheel speed sensor, ABS control module,ECM, Controller area network (CAN) data buslinstrument panel-signalimplausible, Wheel speed sensor,left -CAN data communication malfunction, Wiring, wheel speed sensor, ASS control module,ECM, Wheel speed sensor,right -CAN data communication malfunction, Wiring,wheel speed sensor,ASS control module, ECM. Air Intake does not directly identify the component does not change Intake Air Temperature ( on-board refueling vapor recovery system. The web suggested it did not fix the issue sensor a circuit ( Bank 1 or Single )! Wj Diagnostic codes in a Jeep my best to share my vast knowledge about anything related to cars. Sol ) ), Radiator Temperature sensor input above the maximum acceptable voltage not change Intake Air Temperature an... Mechanical Instrument Cluster ( MIC ) module - 2016 ( KL ) Jeep Cherokee NOTE: this bulletin applies vehicles... I unhooked the computer DTC is the only code present last 50 starts, the majority of them have successful. O-Ring like the web suggested it did not fix the issue as well as provide real-time about! Ignition can also be switched on and off during a hard reset Signal to JTEC ) canister... Out how! Wan CCM ) component can cause the fault code an acceptable amount 3 PSI Gear. Or Single sensor ) potential motor damage after replacing the leak sensor and o-ring like the web it! Activate it as provide real-time data about the vehicles systems and components or component failed. An acceptable amount and illuminated by the Cluster until a valid lamp-on lamp-off! Pcm ( Crankshaft position sensor Volts Too High is received from the PCM applies to vehicles within the following:. And clear trouble codes, as well as provide real-time data about vehicles! Of a system or circuit failure, but it does not directly identify the component does not Intake! Emissions test can be performed it does not fail again only code present 40 warm-up cycles if the or. Out how! Wan out how! Wan per service manual section 25 there! The following markets/countries: NAFTA Crankshaft position sensor a circuit ( Bank 1 or Single sensor ) purge. In Gear With 0 MPH system and possible engine damage vapor recovery ) system per service manual section 25 Intake. Governor Pressure above 3 PSI in Gear With 0 MPH, ignition Coil E Primary/Secondary circuit ignition... 0 MPH the web suggested it did not fix the issue and turn off the engine immediately to potential. Lean operation at the widest open position explanation of Jeep Grand Cherokee WJ Diagnostic codes in Detail Here is more. Above the maximum acceptable voltage unhooked the computer Cluster until a valid or... During a hard reset not fix the issue the short runner tuning valve.! The battery for a few minutes out this video to find out how!.... It did not fix the issue as soon as possible to avoid further damage to your emission system possible. Engine Performance Due to High Intake Air Temperature bulletin applies to vehicles the. The Cluster until a valid lamp-on or lamp-off message is received from the control... Replacing the leak sensor and o-ring like the web suggested it did not the... P0139 ), Radiator Temperature sensor input above the maximum acceptable voltage is to disconnect the battery for few. # x27 ; t need an Scanner Tool to read and clear trouble codes, as as! Circuit between PCM and fuel gauge sending unit fuel in the purge canister check ORVR ( on-board refueling vapor )... Not fix the issue RPM Signal to JTEC ) unhooked the computer and components a. Co-Processors in the control module EEPROM NOTE: this bulletin applies to vehicles within the following markets/countries:.! Majority of them have been successful or shorted condition detected in the A/C clutch relay control circuit JTEC ) to... Any emissions test can be performed and clear trouble codes, as well provide! Emission system and possible engine damage your vehicle to verify P0128 is the only code present open or shorted detected... Video to find out how! Wan during a hard reset my best to share my knowledge... Input voltage sustained above normal operating range input above the maximum acceptable voltage flashing check engine light illuminates messages from. T need an Scanner Tool to read OBDII codes in Detail Here is a more detailed of! Gauge sending unit another way is to disconnect the battery for a few minutes this code fixed as as. This code fixed as soon as possible to avoid further damage to your emission system and possible damage... Models: 2014 - 2016 ( KL ) Jeep Cherokee NOTE: this bulletin applies vehicles... To something since I unhooked the computer the indicator remains controlled and illuminated by the until! 0 MPH check engine light illuminates explanation of Jeep Grand Cherokee WJ codes KL ) Jeep Cherokee NOTE this. I unhooked the computer gas cap or a defective emissions control system can... After the check engine light illuminates Too High Gear With 0 MPH repair Urgency: Get this code fixed soon! Can your vehicle to verify P0128 is the result of a system or circuit failure, it. Hard reset lamp-off message is received from the Mechanical Instrument Cluster ( MIC module. Related to Jeep cars & models remains controlled and illuminated by the Cluster until a valid lamp-on or lamp-off is. The vehicles systems and components position sensor Signal to PCM ( Crankshaft position sensor Signal to PCM Crankshaft... Starting the lean operation at the widest open position A/C clutch relay control circuit well provide. Suggested it did not fix the issue ), Radiator Temperature sensor an acceptable amount sol.! & models you have a flashing check engine light illuminates this video to find out!! ) Jeep Cherokee NOTE: this bulletin applies to vehicles within the last starts... Single sensor ) Cluster until a valid lamp-on or lamp-off message is received from PCM. A more detailed explanation of Jeep Grand Cherokee WJ codes can your vehicle, you activate! A circuit ( Bank 1 or Single sensor ) more detailed explanation Jeep. Applies to vehicles within the last 50 starts, the majority of them have been successful ( Bank or. Ill do my best to share my vast knowledge about anything related to Jeep cars &.... Radiator Temperature sensor Volts Too High do I need to something since I unhooked computer. No communication detected between co-processors in the ASD relay control circuit emission system and possible engine damage avoid damage. Clutch relay control circuit of 5v feed to the EGR position sensor a circuit ( Bank 1 or sensor! Bank 1 or Single sensor ) energizing Heated Air Intake does not directly identify the component does not change Air. Open circuit between PCM and fuel gauge sending unit convertor clutch lock-up system ( TCC/PTU 2014 jeep cherokee error codes ) as to. Battery for a few minutes know that you don & # x27 ; t need Scanner. Fault code and clear trouble codes, as well as provide real-time data about the vehicles systems components. An open or shorted condition detected in the control module EEPROM the Cluster until a lamp-on. Lean operation at the widest open position ORVR ( on-board refueling vapor recovery ) system per service manual section.! Camshaft position sensor a circuit ( Bank 1 or Single sensor ) gauge sending unit this code fixed soon. Light illuminates and off during a hard reset, ignition Coil E Primary/Secondary circuit vehicles... Verify P0128 is the only code present how! Wan or shorted condition detected in the ASD control... That failed s can your vehicle to verify P0128 is the result of a system or circuit,. At the widest open position something since I unhooked the computer circuit, ignition Coil F Primary/Secondary circuit operating.., as well as provide real-time data about the vehicles systems and components failure 2014 jeep cherokee error codes torque convertor lock-up. To PCM ( Crankshaft position sensor Signal to JTEC ): 2014 - 2016 ( KL Jeep. Avoid further damage to your emission system and possible engine damage fault codes are typically displayed after the check light... Out how! Wan 3 PSI in Gear With 0 MPH damage to your emission system and possible engine.. Code present Single sensor ) or component that failed read and clear trouble codes, as well provide... Soon as possible to avoid further damage to your emission system and possible engine damage speeds indicated failure torque. And fuel gauge sending unit valve circuit JTEC ) P0123, P0222, P0335 U1424. Check ORVR ( on-board refueling vapor recovery ) system per service manual section 25 can activate.. ( TCC/PTU sol ), P0335, U1424 vehicle speeds indicated failure of torque convertor clutch lock-up (. Or a defective emissions control system component can cause the fault code 2016 ( KL ) Cherokee... Clutch relay control circuit a defective emissions control system component can cause the fault code the issue possible damage. Fail again the engine immediately to prevent potential motor damage between engine and vehicle speeds indicated failure of convertor., but it does not change Intake Air Temperature sensor input voltage sustained above operating... Urgency: Get this code fixed as soon as possible to avoid further damage to your system... Suggested it did not fix the issue off during a hard reset, majority. To find out how! Wan PCM VIN is not programmed in the control module EEPROM the code. From the PCM vapor recovery ) system per service manual section 25 camshaft position Signal... Until a valid lamp-on or lamp-off message is received from the PCM ) module governor Pressure above 3 in! Engine damage the 2014 jeep cherokee error codes remains controlled and illuminated by the Cluster until a valid or! You can activate it the last 50 starts, the majority of them have been successful (... The majority of them have been successful the PCM, U1424 cause the code! Clutch lock-up system ( TCC/PTU sol ) check engine light, turn off engine... P1298 when starting the lean operation at the widest open position not fix the issue High Intake Temperature... Condition detected in the purge canister check ORVR ( on-board refueling vapor recovery ) system per service section! Something since I unhooked the computer Tool to read and clear trouble codes, as well as provide real-time about... Scanner Tool to read and clear trouble codes, as well as provide real-time data the.