Category: Buick

P1452 Buick Unable To Bleed – Up Vacuum in Tank Symptoms – Engine Light ON (or Service Engine Soon Warning Light) Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse – ?David Dunbar Buick – Buick Century – Buick LaCrosse – Buick LeSabre – Buick Lucerne – Buick Park Avenue – Buick Regal – Buick…

P1453 Buick Fuel Tank Pressure Relief Valve Malfunction Symptoms – Engine Light ON (or Service Engine Soon Warning Light) Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse – ?David Dunbar Buick – Buick Century – Buick LaCrosse – Buick LeSabre – Buick Lucerne – Buick Park Avenue – Buick Regal – Buick Verano –…

P1454 Buick Fuel Tank Pressure (FTP) Sensor Range/Performance Problem Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse – ?David Dunbar Buick – Buick Century – Buick LaCrosse – Buick LeSabre – Buick Lucerne – Buick Park Avenue – Buick Regal – Buick Verano – Buick Enclave – Buick Encore – Buick Rainier – Buick…

P1448 Buick 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…

P1449 Buick Evaporative Check Solenoid Circuit Malfunction Possible causes – Battery Module Tech description Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1449 Buick 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…

P1450 Buick 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…

P1444 Buick 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…

P1445 Buick 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) Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse – ?David Dunbar Buick –…

P1446 Buick 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…

P1447 Buick 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…

P1442 Buick Secondary Air Injection System Switching Valve No.2 Stuck Close 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…

P1443 Buick 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…

P1440 Buick 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…

P1441 Buick 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…

P1436 Buick 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…

P1437 Buick 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)….

P1438 Buick A/C Evaporator Air Temperature Circuit Range/Performance Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1438 Buick Information for specific makes Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse – ?David Dunbar Buick – Buick Century – Buick LaCrosse – Buick LeSabre – Buick Lucerne – Buick Park Avenue –…

P1439 Buick Motor Drive Module (MDM) Short Circuit Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse – ?David Dunbar Buick – Buick Century – Buick LaCrosse – Buick LeSabre – Buick Lucerne – Buick Park Avenue – Buick Regal – Buick Verano – Buick Enclave – Buick Encore – Buick Rainier – Buick Rendezvous…

P1432 Buick Fuel Level Sensor 2 Circuit Low Voltage Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse – ?David Dunbar Buick – Buick Century – Buick LaCrosse – Buick LeSabre – Buick Lucerne – Buick Park Avenue – Buick Regal – Buick Verano – Buick Enclave – Buick Encore – Buick Rainier – Buick…

P1433 Buick A/C Refrigerant Temperature Circuit Low Symptoms – Engine Light ON (or Service Engine Soon Warning Light) Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse – ?David Dunbar Buick – Buick Century – Buick LaCrosse – Buick LeSabre – Buick Lucerne – Buick Park Avenue – Buick Regal – Buick Verano – Buick…