Possible causes – Transmission Solenoid/Pressure Switch harness is open or shorted – Transmission Solenoid/Pressure Switch circuit poor electrical connection – Faulty Transmission Solenoid/Pressure Switch – Internal transmission damage – Faulty Engine Control Module (ECM) – Faulty Transmission Control Module (TCM)

Possible causes – Warm Up Three Way Catalytic converter deterioration or malfunction– Exhaust system leaks– Loose front or rear HO2Ss– Faulty front heater O2 sensor– O2 sensors harness is open or shorted– O2 sensors poor electrical connection Tech notes As

Possible causes – Warm Up Three Way Catalytic converter deterioration or malfunction– Exhaust system leaks– Loose front or rear HO2Ss– Faulty front heater O2 sensor– O2 sensors harness is open or shorted– O2 sensors poor electrical connection Tech notes As

Possible causes – Weak battery – Low voltage while cranking– Faulty Engine Control Module (ECM) relay– Blown ECM fuse– Faulty ECM– ECM harness is open or shorted– ECM circuit poor electrical connection Tech notes Check all the ECM fuses, if

Possible causes – Water in fuel– Faulty Water In Fuel (WIF) Sensor Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P0169 JEEP Description The ECM has detected that the WIF light has remained on longer than expected

Possible causes – Weak battery – Low voltage while cranking– Faulty Engine Control Module (ECM) relay– Blown ECM fuse– Faulty ECM– ECM harness is open or shorted– ECM circuit poor electrical connection Tech notes Check all the ECM fuses, if

Possible causes – Weak battery- Low voltage while cranking– Faulty Engine Control Module (ECM) relay– Blown ECM fuse– Faulty ECM– ECM harness is open or shorted– ECM circuit poor electrical connection Tech notes Check all the ECM fuses, if the

Possible causes – Weak battery- Low voltage while cranking– Faulty Engine Control Module (ECM) relay– Blown ECM fuse– Faulty ECM– ECM harness is open or shorted– ECM circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon

Possible causes – Weak battery- Low voltage while cranking– Faulty Engine Control Module (ECM) relay– Blown ECM fuse– Faulty ECM– ECM harness is open or shorted– ECM circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon

Possible causes – Wheel slippage (water, ice, mud, and snow)– Excessive engine RPM in NEUTRAL or operated in the wrong transmission gear.– Mechanical engine problems– Mechanical transmission problem– Powertrain control module– Transmission control problem Symptoms – Engine Light ON (or

Possible causes – Check for mechanical condition- Hoses and tubing– Vacuum supply to surge solenoid– Failed Wastegate Actuator– Failed Turbocharger When is the code detected? The ECM did not detect a sufficient variance between the TIP sensor signal and the

Possible causes – Check other service codes first When is the code detected? The Engine Control Module (ECM) has detected a fault when comparing the Ambient Air, Coolant Temp, and Intake Air temperatures

Possible causes – Failed Transmission Control Module (TCM) Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1639 JEEP Description The TCM is reporting an internal processor error

Possible causes – Faulty ASD Relay– Faulty CNG Relay– ASD or CNG Relay harness is open or shorted– ASD or CNG Relay circuit poor electrical connection– ASD or CNG Relay poor ground or supply voltage condition When is the code

Possible causes – Faulty Electric Throttle Control (ETC) Actuator– Electric Throttle Control (ETC) Actuator harness is open or shorted– Electric Throttle Control (ETC) Actuator circuit poor electrical connection When is the code detected? he ECM has detected an error between

Possible causes – Faulty electric throttle control actuator (TP sensor 1 and 2)– Throttle Position Sensor harness is open or shorted– Throttle Position Sensor circuit poor connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P2135 JEEP

Possible causes – Faulty Electronic Throttle Control (ETC) Motor– Electronic Throttle Control (ETC) Motor harness is open or shorted– Electronic Throttle Control (ETC) Motor circuit poor electrical connection When is the code detected? The P2119 code is set when the

Possible causes – Faulty Electronic Throttle Control (ETC)– Electronic Throttle Control (ETC) harness is open or shorted– Electronic Throttle Control (ETC) circuit poor electrical connection When is the code detected? The Engine Control Moduel (ECM) has detected that the PWM

Possible causes – Faulty Engine control Module (ECM)– Engine control Module(ECM) harness is open or shorted– Engine control Module (ECM) cicuit poor electricl connection– Low battery voltage Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1698 JEEP

Possible causes – Faulty Exhaust Gas Recirculation (EGR) valve– Faulty Exhaust Gas Recirculation (EGR) valve solenoid– Exhaust Gas Recirculation (EGR) valve carbon blockage When is the code detected? The Engine Control Module (ECM) is detecting Exhaust Gas Recirculation (EGR) flow