Category: OBDii Powertrain Codes

P1237 Injector Circuit Cylinder 6 Intermittent

P1237 Injector Circuit Cylinder 6 Intermittent Possible causes – Faulty Fuel Pump Driver Module (FPDM)– Fuel Pump Driver Module (FPDM) harness is open or shorted– Fuel Pump Driver Module (FPDM) circuit poor electrical connection– Faulty fuel pump What about the obd code? Fuel pump driver module has detected a fault in the fuel pump secondary…

P1238 Turbocharger Control valve

P1238 Turbocharger Control valve Possible causes – Air leakage after turbocharger – Hoses between turbocharger and turbocharger control valve are loose, blocked or damage – Hoses between turbocharger control valve and pressure servo are loose, blocked or damage – Faulty turbocharger control valve – Faulty boos pressure control valve pressure servo – Sticking boost pressure…

P1226 Control Sleeve Sensor Malfunction

P1226 Control Sleeve Sensor Malfunction Possible causes Electric throttle control actuator (TP sensor 1 and 2) What about the obd code? Closed throttle position learning is not performed successfully, repeatedly. Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1226 Description Electric Throttle Control Actuator consists of throttle control motor, acceleration pedal position…

P1227 Wastegate Failed Closed (Over Pressure)

P1227 Wastegate Failed Closed (Over Pressure) Possible causes Harness or connectors (The APP sensor 2 circuit is open or shorted.) Accelerator pedal position sensor (Accelerator pedal position sensor 2) What about the obd code? An excessively low voltage from the APP sensor 2 is sent to ECM. Symptoms – Engine Light ON (or Service Engine…

P1228 Injector Circuit Cylinder 3 Intermittent

P1228 Injector Circuit Cylinder 3 Intermittent Possible causes Harness or connectors (The APP sensor 2 circuit is open or shorted.) Accelerator pedal position sensor (Accelerator pedal position sensor 2) What about the obd code? An excessively high voltage from the APP sensor 2 is sent to ECM. Symptoms – Engine Light ON (or Service Engine…

P1229 Sensor Power Supply Circuit Shorted

P1229 Sensor Power Supply Circuit Shorted Possible causes – Check harness body ground– Faulty Accelerator Pedal Position (APP) sensor– Faulty Power Steering Pressure (PSP) sensor– Faulty Refrigerant Pressure sensor– Faulty EVAP Control System Pressure sensor Tech description Start by inspecting the connections of the harness to the body grounds. What about the obd code? The…

P1232 Fuel Pump Speed Primary Circuit Malfunction

P1232 Fuel Pump Speed Primary Circuit Malfunction Possible causes Open or shorted low fuel pump (LFP) circuit. Open VPWR to the low speed fuel pump relay. Damaged low speed fuel pump relay. Damaged PCM. Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1232 Description The PCM monitors the low speed fuel pump…

P1225 Needle Lift Sensor Malfunction

P1225 Needle Lift Sensor Malfunction Possible causes Electric throttle control actuator (TP sensor 1 and 2) What about the obd code? Closed throttle position learning value is excessively low. Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1225 Description Electric Throttle Control Actuator consists of throttle control motor, acceleration pedal position sensor,…

P1220 Fuel Pump Control Module

P1220 Fuel Pump Control Module Possible causes – Fuel Pump Control Module (FPCM) harness is open or shorted– Fuel Pump Control Module (FPCM) circuit poor electrical connection– Faulty dropping resistor– Faulty Fuel Pump Control Module (FPCM) What about the obd code? An improper voltage signal from the Fuel Pump Control Module (FPCM), which is supplied…

P1223 Pedal Demand Sensor B Circuit High Input

P1223 Pedal Demand Sensor B Circuit High Input Possible causes Harness or connectors (The TP sensor 2 circuit is open or shorted.) Electric throttle control actuator (TP sensor 2) What about the obd code? An excessively low voltage from the TP sensor 2 is sent to ECM. Symptoms – Engine Light ON (or Service Engine…

P1224 Throttle Position Sensor B Out Of Self Test Range

P1224 Throttle Position Sensor B Out Of Self Test Range Possible causes Harness or connectors (The TP sensor 2 circuit is open or shorted.) Electric throttle control actuator (TP sensor 2) What about the obd code? An excessively high voltage from the TP sensor 2 is sent to ECM. Symptoms – Engine Light ON (or…

P1212 Injector Control Pressure Not Detected During Crank

P1212 Injector Control Pressure Not Detected During Crank Possible causes Harness or connectors (The CAN communication line is open or shorted.) ABS actuator and electric unit (control unit) Dead (Weak) battery What about the obd code? ECM can not receive the information from ABS/TCS control unit continuously. Symptoms – Engine Light ON (or Service Engine…