Category: Chevrolet

P0738 Chevrolet Transmission Control Module (TCM) Engine Speed Output Circuit Low OBD Code: System: Subsystem:  P0738 Chevrolet – (ASE)  Powertrain  Transmission Controls Trouble Code Description: Transmission Control Module (TCM) Engine Speed Output Circuit Low Location: Analysis: Possible Causes:    End of Range – Circuit Lower Than Expected   Tech description:

P0739 Chevrolet Transmission Control Module (TCM) Engine Speed Output Circuit High OBD Code: System: Subsystem:  P0739 Chevrolet – (ASE)  Powertrain  Transmission Controls Trouble Code Description: Transmission Control Module (TCM) Engine Speed Output Circuit High Location: Analysis: Possible Causes:    End of Range – Circuit Higher Than Expected   Tech description:

P0731 Chevrolet 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 Chevrolet is detected when A/T cannot be shifted…

P0732 Chevrolet 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….

P0733 Chevrolet 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 Chevrolet is detected when A/T cannot be shifted…

P0734 Chevrolet 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 Chevrolet is detected when A/T cannot be shifted…

P0735 Chevrolet 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 Chevrolet is detected when A/T cannot be shifted…

P0728 Chevrolet 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 Chevrolet Codes is…

P0729 Chevrolet Automatic Transmission 6th Gear Incorrect Ratio Possible causes – Low transmission fluid level– Shift solenoid mechanical fault– Hydraulic circuit fault– Transmission failure Symptoms – Engine Light ON (or Service Engine Soon Warning Light)– Transmission will not shift into 6th gear P0729 Chevrolet Description This malfunction is detected when the A/T does not shift…

P0730 Chevrolet 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…

P0726 Chevrolet 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 Chevrolet Codes is…

P0727 Chevrolet 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 Chevrolet Codes…

P0722 Chevrolet 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…

P0723 Chevrolet 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…

P0724 Chevrolet 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…

P0725 Chevrolet 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 Chevrolet Codes is triggered…

P0720 Chevrolet Output Speed Sensor Circuit Malfunction Possible causes – Faulty Revolution Sensor– Revolution Sensor harness is open or shorted– Revolution Sensor circuit poor electrical connection Tech description On most Infiniti vehicles, the vehicle speed sensor is called Revolution Sensor. If there are no mechanical problems in the transmission, usually replacing the revolution sensor takes…