Tag: BUICK

Possible causes – Leaking fuel pressure regulator– Leaking fuel injector When is the obd code mean? The average long term fuel trim values at idle are less than -30 percent for 10 seconds Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P2188 BUICK OBD Code Description The engine control module (ECM) controls…

Possible causes – Faulty Vehicle Speed Sensor– Vehicle speed sensor harness or connectors is open or shorted– Vehicle speed sensor circuit poor electrical connection– Faulty Powertrain Control Module (PCM) When is the obd code mean? If the Powertrain Control Module (PCM) detects a low vehicle speed when there is a high engine speed in a…

Possible causes – Faulty Vehicle Speed Sensor– Vehicle speed sensor harness or connectors is open or shorted– Vehicle speed sensor circuit poor electrical connection– Faulty Powertrain Control Module (PCM) When is the obd code mean? The almost 0 km/h (0 MPH) signal from vehicle speed sensor is sent to Powertrain Control Module (PCM) even when…

Possible causes – Faulty Vehicle Speed Sensor– Vehicle speed sensor harness or connectors is open or shorted– Vehicle speed sensor circuit poor electrical connection– Faulty Powertrain Control Module (PCM) When is the obd code mean? When the Powertrain Control Module (PCM) detects an unrealistically large drop in the vehicle speed, then DTC P0503 sets. Symptoms…

Possible causes – Faulty Wheel Speed Sensor– Wheel Speed Sensor harness is open or shorted– Wheel Speed Sensor circuit poor electrical connection When is the obd code mean? The Engine Control Module (ECM) detects an invalid rough road signal from the wheel speed sensor. P1396 BUICK OBD Code Description The road situation is estimated with…

Possible causes – Fualty ECM– Wrong ECM for vehicle– Service program error When is the obd code mean? Engine Control Module (ECM) program does not recognize the vehicles id, or the id is missing in the ECM. Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1681 BUICK OBD Code Description This diagnostic…

Possible causes – Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 harness is open shorted to ground– Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 circuit poor electrical connection– Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1– Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 circuit fuse– Faulty Engine Control Module (ECM) When is…

Possible causes – High fuel pressure– Leaking fuel injector or pressure regulator– Failed Mass Air Flow (MAF) sensor When is the obd code mean? The Engine Control Module (ECM) has detected a rich air/fuel ratio Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P2178 BUICK OBD Code Description The Engine Control Module…

Possible causes – Idle Air Control Valve harness is open or shorted– Idle Air Control Valve circuit poor electrical connection– Faulty Idle Air Control Valve Symptoms – Engine Light ON (or Service Engine Soon Warning Light)– Engine rough idle

Possible causes – Intake air leaks– Faulty front heated oxygen sensor– Ignition misfiring– Faulty fuel injectors– Exhaust gas leaks– Incorrect fuel pressure– Lack of fuel– Faulty Mass Air Flow (MAF) sensor– Incorrect Positive Crankcase Ventilation (PCV) hose connection Tech description If the P0171 is combined with the P0174 code, it’s very likely that the problem…