Category: OBDii Powertrain Codes

P1460 Wide open throttle A/C cutoff relay circuit Possible causes Open or shorted WAC circuit. Damaged WAC relay (or CCRM). Open VPWR circuit to the WAC relay. Damaged PCM. Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1460 Description Monitors the wide open throttle A/C cutoff (WAC) circuit output from the PCM….

P1461 A/C pressure sensor circuit voltage low Possible causes ACP sensor circuit short to PWR. ACP circuit open. Damaged PCM. ACP circuit short to VREF. ACP circuit short to SIGRTN. Damaged ACP sensor. Tech description Verify a VREF voltage between 4 and 6 volts. Symptoms – Engine Light ON (or Service Engine Soon Warning Light)…

P1452 Unable To Bleed – Up Vacuum in Tank Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

P1453 Fuel Tank Pressure Relief Valve Malfunction Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

P1454 Fuel Tank Pressure (FTP) Sensor Range/Performance Problem

P1455 Exhaust Gas Temperature Sensor 1 Range/Performance Possible causes – Faulty Exhaust Gas Temperature Sensor– Exhaust Gas Temperature Sensor harness is open or shorted– Exhaust Gas Temperature Sensor circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

P1449 Evaporative Check Solenoid Circuit Malfunction Possible causes – Battery Module Tech description Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1449 Description The high-voltage battery in the IMA (integrated motor assist) system is designed to operate within the upper and lower limits of the SOC (state of charge) voltage and the…

P1450 Unable To Bleed Up Fuel Tank Vacuum Possible causes Blockages or kinks in the EVAP canister tube or EVAP canister purge outlet tube (between the fuel tank, EVAP the canister purge valve and the EVAP canister). Fuel filler cap stuck closed (no vacuum relief). Contaminated fuel vapor elbow on the EVAP canister. Restricted EVAP…

P1451 EVAP Control System Canister Vent Solenoid Circuit Malfunction Possible causes – Loose or missing gas cap– Faulty gas cap– Canister Vent Solenoid harness is open or shorted– Canister Vent Solenoid electrical circuit poor connection– Faulty Canister Vent Solenoid Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1451 Mercury Description The Engine…

P1443 Evaporative Emission Control System Control Valve Possible causes Blocked fuel vapor hose between the EVAP canister purge valve and the FTP sensor. Blocked fuel vapor hose between the EVAP canister purge valve and the engine intake manifold. Blocked vacuum hose between the EVAP canister purge valve solenoid and the engine intake manifold. EVAP canister…

P1444 Secondary Air Injection System Switching Valve No.2 Stuck Open Bank 2 Possible causes – Faulty Vacuum Switching Valve (VSV)– VSV for air injection control circuit Bank 2– Air switching valve No.2 Bank 2– VSV for air injection system Bank 2– Engine Control Module (ECM) Symptoms – Engine Light ON (or Service Engine Soon Warning…

P1445 Catalyst Temperature Sensor 2 Circuit Range/Performance Possible causes – Faulty Catalyst Temperature Sensor– Catalyst Temperature Sensor harness is open or shorted– Catalyst Temperature Sensor circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

P1446 EVAP Canister Vent Control Valve Close Possible causes – EVAP control system pressure sensor and the circuit– Blocked rubber tube to EVAP canister vent control valve– EVAP canister vent control valve– Water separator– EVAP canister is saturated with water Tech description What about the obd code? EVAP canister vent control valve remains closed under…

P1447 Evaporative Emission Control System Purge Flow Monitor Possible causes – EVAP canister purge volume control solenoid valve stuck closed – EVAP control system pressure sensor and the circuit – Loose, disconnected or improper connection of rubber tube – Blocked rubber tube – Cracked EVAP canister – EVAP canister purge volume control solenoid valve circuit…

P1448 EVAP Canister Vent Control Valve Open Possible causes – EVAP canister vent control valve– EVAP canister is saturated with water– EVAP control system pressure sensor and the circuit– Blocked rubber tube to EVAP canister vent control valve– Water separator Tech description Start by checking for damage EVAP canister or hoses. If no hoses are…

P1438 A/C Evaporator Air Temperature Circuit Range/Performance Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1438 Information for specific makes

P1438 Motor Drive Module (MDM) Overheating

P1439 Motor Drive Module (MDM) Short Circuit

P1440 Evaporative Emission Control System, Small Leak Possible causes – Incorrect fuel tank vacuum relief valve – Incorrect fuel filler cap used – Fuel filler cap remains open or fails to close – Foreign matter caught in fuel filler cap – Leak is in line between intake manifold and EVAP canister purge volume control solenoid…

P1441 Secondary Air Injection System Switching Valve No.2 Stuck Open Bank 1 Possible causes – Faulty Vacuum Switching Valve (VSV)– VSV for air injection control circuit Bank 1– Air switching valve No.2 Bank 1– VSV for air injection system Bank 1– Engine Control Module (ECM) Symptoms – Engine Light ON (or Service Engine Soon Warning…