Category: OBDii Powertrain Codes

P0730 Faulty Shift Control System Possible causes – Low transmission fluid level– Dirty transmission fluid– Shift solenoids– Transmission mechanical problems– Transmission hydraulic control circuit Tech description Start by inspecting the transmission fluid level and condition, and change fluid if necessary. What about the obd code? The TCM has detected that the transmission is trying to…

P0731 Gear 1 Incorrect Ratio Possible causes – Low transmission fluid level– Dirty transmission fluid– Shift solenoids– Transmission mechanical problems– Transmission hydraulic control circuit Tech description Start by inspecting the transmission fluid level and condition, and change fluid if necessary. What about the obd code? P0731 is detected when A/T cannot be shifted to the…

P0732 Gear 2 Incorrect Ratio Possible causes – Low transmission fluid level– Dirty transmission fluid– Faulty Shift Solenoids– Shift Solenoids harness is open or shorted– Shift Solenoids circuit poot electrical connection– Transmission mechanical problems– Transmission hydraulic control circuit Tech description Start by inspecting the transmission fluid level and condition, and change fluid if necessary. What…

P0733 Gear 3 Incorrect Ratio Possible causes – Low transmission fluid level– Dirty transmission fluid– Shift solenoids– Transmission mechanical problems– Transmission hydraulic control circuit Tech description Start by inspecting the transmission fluid level and condition, and change fluid if necessary. What about the obd code? P0733 is detected when A/T cannot be shifted to the…

P0734 Gear 4 Incorrect Ratio Possible causes – Low transmission fluid level– Dirty transmission fluid– Shift solenoids– Transmission mechanical problems– Transmission hydraulic control circuit Tech description Start by inspecting the transmission fluid level and condition, and change fluid if necessary. What about the obd code? P0734 is detected when A/T cannot be shifted to the…

P0735 Gear 5 Incorrect Ratio Possible causes – Low transmission fluid level– Dirty transmission fluid– Shift solenoids– Transmission mechanical problems– Transmission hydraulic control circuit Tech description Start by inspecting the transmission fluid level and condition, and change fluid if necessary. What about the obd code? P0735 is detected when A/T cannot be shifted to the…

P0736 Gear Ratio Error In Reverse Gear Possible causes – Low transmission fluid level– Dirty transmission fluid– Shift solenoids– Transmission mechanical problems– Transmission hydraulic control circuit Tech description Start by inspecting the transmission fluid level and condition, and change fluid if necessary. What about the obd code? The ECM has detected that the transmission input…

P0737 Transmission Control Module (TCM) Engine Speed Output Circuit OBD Code: System: Subsystem:  P0737 – (ASE)  Powertrain  Transmission Controls Trouble Code Description: Transmission Control Module (TCM) Engine Speed Output Circuit Location: Analysis: Possible Causes:    Circuit Issue   Tech description:

P0724 Brake Switch B Circuit High Possible causes – Faulty Brake Switch– Brake Switch harness is open or shorted– Brake Switch circuit poor electrical connection– Misadjusted Brake Switch What about the obd code? The stop light switch does not turn off even once vehicle is driven. Symptoms – Engine Light ON (or Service Engine Soon…

P0725 Engine Speed Sensor Circuit Possible causes – Faulty Crankshaft Position (CKP) Sensor– Crankshaft Position (CKP) Sensor harness is open or shorted– Crankshaft Position (CKP) Sensor circuit poor electrical connection– Communication error between the Engine Control Module (ECM) and Transmission Control Module (TCM) What about the obd code? The P0725 Codes is triggered when Transmission…

P0726 Engine Speed Input Circuit Range/Performance Possible causes – Faulty Crankshaft Position (CKP) Sensor– Crankshaft Position (CKP) Sensor harness is open or shorted– Crankshaft Position (CKP) Sensor circuit poor electrical connection– Communication error between the Engine Control Module (ECM) and Transmission Control Module (TCM) What about the obd code? The P0726 Codes is triggered when…

P0727 Engine Speed Input Circuit No Signal Possible causes – Faulty Crankshaft Position (CKP) Sensor– Crankshaft Position (CKP) Sensor harness is open or shorted– Crankshaft Position (CKP) Sensor circuit poor electrical connection– Communication error between the Engine Control Module (ECM) and Transmission Control Module (TCM) What about the obd code? The P0727 Codes is triggered…

P0728 Engine Speed Input Circuit Intermittent Possible causes – Faulty Crankshaft Position (CKP) Sensor– Crankshaft Position (CKP) Sensor harness is open or shorted– Crankshaft Position (CKP) Sensor circuit poor electrical connection– Communication error between the Engine Control Module (ECM) and Transmission Control Module (TCM) What about the obd code? The P0728 Codes is triggered when…

P0721 Output Speed Sensor Range/Performance Possible causes – Faulty Speed Sensor– Speed Sensor harness is open or shorted– Speed Sensor circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)– Speedometer improper reading– Possible shifting problems P0721 Description The speed sensor detects the revolution of the idler gear parking pawl…

P0722 Output Speed Sensor No Signal Possible causes – Faulty Speed Sensor– Speed Sensor harness is open or shorted– Speed Sensor circuit poor electrical connection What about the obd code? The output shaft speed sensor failed to provide a signal to the Transmission Control Module (TCM) upon initial movement of vehicle. Symptoms – Engine Light…

P0723 Output Speed Sensor Intermittent Signal Possible causes – Faulty Speed Sensor– Speed Sensor harness is open or shorted– Speed Sensor circuit poor electrical connection What about the obd code? The output shaft speed sensor failed to provide a signal to the Transmission Control Module (TCM) upon initial movement of vehicle. Symptoms – Engine Light…

P0718 Intermittent Failure Input Shaft Speed Sensor Possible causes – Faulty Transmission Speed Sensor– Transmission Speed Sensor harness is open or shorted– Transmission Speed Sensor circuit poor electrical connection What about the obd code? Diagnostic Trouble Code (DTC) P0718 is detected when TCM or ECM receives and intermittent signal from the sensor. Symptoms – Engine…

P0719 Brake Switch Circuit Low Input Possible causes – Faulty Brake Switch– Brake Switch harness is open or shorted– Brake Switch circuit poor electrical connection What about the obd code? When the Powertrain Control Module (PCM) detects an open brake switch circuit (0 volts, low input) during accelerations, then the P0719 is set. Symptoms –…