Category: Buick

P0135 Buick O2 Sensor Heater Circuit Malfunction Bank 1 Sensor 1 Possible causes – Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1– Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit fuse– Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit open shorted to ground– Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit…

P0136 Buick HO2S12 Sensor Range/Performance Condition Possible causes – Faulty Rear Heated Oxygen Sensor Bank 1– Rear Heated Oxygen Sensor Bank 1 harness is open or shorted– Rear Heated Oxygen Sensor Bank 1 circuit poor electrical connection– Inappropriate fuel pressure– Faulty fuel injectors– Intake air leaks may be faulty– Exhaust gas leaks Tech description Replacing…

P0137 Buick HO2S Circuit Low Voltage Bank 1 Sensor 2 Possible causes – Faulty Rear Heated Oxygen Sensor Bank 1– Rear Heated Oxygen Sensor Bank 1 harness is open or shorted– Rear Heated Oxygen Sensor Bank 1 circuit poor electrical connection– Inappropriate fuel pressure– Faulty fuel injectors– Intake air leaks may be faulty– Exhaust gas…

P0131 Buick HO2S11 Sensor Circuit Low Voltage Possible causes – Faulty Front Heated Oxygen Sensor Bank 1– Front Heated Oxygen Sensor Bank 1 harness is open or shorted– Front Heated Oxygen Sensor Bank 1 circuit poor electrical connection– Inappropriate fuel pressure– Faulty fuel injectors– Intake air leaks may be faulty– Exhaust gas leaks Tech description…

P0132 Buick HO2S11 Sensor Circuit High Voltage Possible causes – Faulty Front Heated Oxygen Sensor Bank 1– Front Heated Oxygen Sensor Bank 1 harness is open or shorted– Front Heated Oxygen Sensor Bank 1 circuit poor electrical connection– Inappropriate fuel pressure– Faulty fuel injectors– Intake air leaks may be faulty– Exhaust gas leaks Tech description…

P0133 Buick HO2S11 Sensor Circuit Slow Response Possible causes – Faulty Front Heated Oxygen Sensor Bank 1– Front Heated Oxygen Sensor Bank 1 harness is open or shorted– Front Heated Oxygen Sensor Bank 1 circuit poor electrical connection– Inappropriate fuel pressure– Faulty fuel injectors– Intake air leaks may be faulty– Exhaust gas leaks Tech description…

P0129 Buick Barometric Pressure Out Of Range Low Possible causes – Faulty Manifold Absolute Pressure (MAP) sensor– Manifold Absolute Pressure (MAP) sensor harness open or shorted– Manifold Absolute Pressure (MAP) sensor circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P0129 Buick Description The Engine Control Module (ECM) has…

P012A Buick Turbocharger / Supercharger Inlet Pressure Sensor Circuit OBD Code: System: Subsystem:  P012A Buick – (ASE)  Powertrain  Fuel and Air Metering Trouble Code Description: Turbocharger / Supercharger Inlet Pressure Sensor Circuit Location: Analysis: Possible Causes:    Circuit Issue   Tech description: Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse – ?David Dunbar Buick –…

P0127 Buick Intake Air Temperature Too High Possible causes – Faulty Intake Air Temperature (IAT) sensor– Intake Air Temperature (IAT) sensor harness is open or shorted– Intake Air Temperature (IAT) sensor electrical circuit poor connection Tech description If the Intake Air Temperature (IAT) is part of the Mass Air Flow (MAF) the MAF assembly will…

P0128 Buick Engine Coolant Temperature Below Thermostat Regulating Temperature Possible causes – Leaking or stuck open thermostat– Low engine coolant level– Insufficient warm up time– Faulty engine coolant temperature sensor– Engine coolant temperature sensor harness is open or shorted– Engine coolant temperature sensor circuit poor electrical connection Tech description If cooling system is not leaking…

P0124 Buick Throttle Position Sensor/Accelerator Position Pedal Circuit Intermittent Possible causes – Faulty throttle position sensor.– Throttle position sensor harness is open or shorted– Throttle position sensor circuit poor electrical connection What about the obd code? The P0124 Buick code will set if the monitored TPS has an open or short circuit condition Symptoms –…

P0125 Buick Engine Coolant Temperature Sensor Possible causes – Low engine coolant level– Leaking or stuck open thermostat– Faulty Engine Coolant Temperature (ECT) sensor– Engine Coolant Temperature (ECT) sensor harness is open or shorted– Engine Coolant Temperature (ECT) sensor electrical circuit poor connection What about the obd code? The voltage sent to Engine Control Module…

P0126 Buick Insufficient Coolant Temperature for Stable Operation Possible causes – Low engine coolant level– Leaking or stuck open thermostat– Faulty Engine Coolant Temperature (ECT) sensor– Engine Coolant Temperature (ECT) sensor harness is open or shorted– Engine Coolant Temperature (ECT) sensor electrical circuit poor connection What about the obd code? The voltage sent to Engine…

P011A Buick Engine Coolant Temperature (ECT) (Sensor 1 – 2) Correlation OBD Code: System: Subsystem:  P011A Buick – (ASE)  Powertrain  Fuel and Air Metering Trouble Code Description: Engine Coolant Temperature (ECT) (Sensor 1 – 2) Correlation Location: Analysis: Possible Causes:  Sensor 1     Tech description: Buick Vehicle:Buick Regal – ?Buick Riviera – ?Buick LaCrosse –…