Category: OBDii Powertrain Codes

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…

P1432 Fuel Level Sensor 2 Circuit Low Voltage

P1433 A/C Refrigerant Temperature Circuit Low Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

P1434 A/C Refrigerant Temperature Circuit High Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

P1435 A/C Refrigerant Temperature Circuit Range/Performance Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

P1436 A/C Evaporator Air Temperature Circuit Low Possible causes ACET circuit short to ground or SIG RTN. Damaged ACET sensor. Damaged PCM. Tech description The PCM sources a low current 5 volts on the ACET circuit (this voltage can be measured with the sensor disconnected). As the A/C evaporator air temperature changes, the ACET circuit…

P1437 A/C Evaporator Air Temperature Circuit High Possible causes ACET circuit open. SIG RTN circuit open to the ACET sensor. ACET circuit short to power (VREF). Damaged ACET sensor. Damaged PCM. Tech description The PCM sources a low current 5 volts on the ACET circuit (this voltage can be measured with the sensor disconnected). As…

P1426 Tank Ventilation Valve Open Circuit Possible causes – Faulty EVAP Canister Purge Regulator Valve– EVAP Canister Purge Regulator Valve harness is open or shorted– EVAP Canister Purge Regulator Valve circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1426 Description Evaporative Emissions (EVAP) canister purge regulator valve in…

P1427 EGI Mini – MAF Failed Short Circuit Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

P1428 EGI Mini – MAF Failed Open Circuit Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

P1429 Electric Air Pump Primary Failure Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

P1430 Electric Air Pump Secondary Failure Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

P1431 Fuel Level Sensor 2 Circuit Performance

P1425 EGI Glow Plug Secondary Failure Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

P1419 Split Air #2 Circuit Malfunction Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

P1420 Intake Air Low Pressure Switch Circuit Low Voltage

P1421 Cold Start Control Possible causes – Lack of intake air volume (block air filter)– Fuel injection system (Clogged fuel injector or bad fuel pump)– Faulty Engine Control Module (ECM) What about the obd code? The P1421 code is detected when The Engine Control Module (ECM) does not control ignition timing and engine idle speed…

P1422 EGI Temperature Sensor Failure Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

P1423 Intake Air High Pressure Switch Circuit High Voltage

P1424 EGI Glow Plug Primary Failure Symptoms – Engine Light ON (or Service Engine Soon Warning Light)