Category: OBDii Powertrain Codes

P1655 EVAP Purge Solenoid Control Circuit

P1655 EVAP Purge Solenoid Control Circuit Possible causes – Faulty EVAP Purge Solenoid– EVAP Purge Solenoid harness is open or shorted– EVAP Purge Solenoid circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1655 Description The Powertrain Control Module (PCM) has detected an improper voltage level on the output…

P1648 Anti-Theft Device Wrong Security Code

P1648 Anti-Theft Device Wrong Security Code Possible causes – Deterrent key not programmed to vheicle– Faulty Deterrent key– Fualty ignition switch– Poor electrical connection for Deterrent circuit components Symptoms – Engine Light ON (or Service Engine Soon Warning Light)– No or hard engine start situation P1648 Description The Engine Control Module (ECM), the Powertrain Interface…

P1647 Engine Speed Signal Circuit Problem

P1647 Engine Speed Signal Circuit Problem Tech description There are seven (7) codes listed on the service manual for the P1647 code. Try reseting the code first, and if the code comes back, check fuses and the Engine Control Module (ECM) connector. P1647 Description P1647 – Power Command Signal Circuit Low Input P1647 – Power…

P1641 FC Relay 1 Control Circuit

P1641 FC Relay 1 Control Circuit Possible causes – Faulty Cooling Fan Relay– Cooling Fan Relay harness is open or shorted– Cooling Fan Relay circuit poor electrical component Symptoms – Engine Light ON (or Service Engine Soon Warning Light) – Cooling Fan not working P1641 Description Ignition voltage is supplied to the Cooling Fan relay…

P1642 FC Relay 2 And 3 Control Circuit

P1642 FC Relay 2 And 3 Control Circuit Possible causes – Faulty Cooling Fan Relay– Cooling Fan Relay harness is open or shorted– Cooling Fan Relay circuit poor electrical component Symptoms – Engine Light ON (or Service Engine Soon Warning Light) – Cooling Fan not working P1642 Description Ignition voltage is supplied to the Cooling…

P1643 Engine Speed Output Circuit

P1643 Engine Speed Output Circuit Possible causes – Reprogram computer – Faulty ECM Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1643 Description There is a communication problem with Control Area Network (CAN) link from the Engine Control Module (ECM)to the Transmission Control Module (TCM)

P1644 Traction Control Delivered Torque Output Circuit

P1644 Traction Control Delivered Torque Output Circuit Possible causes – Poor connection at the AC motor control module – Open or short circuit condition – Failed AC Motor Control Module What about the obd code? No duty signals are input from the MCM for at least 5 seconds. Symptoms – Engine Light ON (or Service…