P0125 SUBARU Insufficient Coolant Temperature for Closed Loop Fuel Control

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 When is the obd code mean? The voltage sent to Engine Control Module (ECM) from the Engine Coolant…

P0126 SUBARU 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 When is the obd code mean? The voltage sent to Engine Control Module (ECM) from the sensor is…

P2096 SUBARU Post Catalyst Fuel Trim System Too Lean

Possible causes – Low fuel pressure– Misfire condition– Large vacuum leak– Air leak near sensor– Plugged catalytic converter– Lean air/fuel ratio– Faulty front O2 sensor Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P2096 SUBARU OBD Code Description The catalyst’s efficiency is demonstrated by its ability to oxidize CO and hydrocarbon emissions….

P0778 SUBARU Pressure Control Solenoid B Electrical

Possible causes – Low transmission fluid level– Dirty transmission fluid– Faulty line pressure solenoid ‘B’ valve– Line pressure solenoid ‘B’ valve harness is open or shorted– Line pressure solenoid ‘B’ valve circuit poor electrical connection When is the obd code mean? Engine Control Module (ECM) detectes an open or shorted condition on the solenoid circuit…

P1400 SUBARU Fuel Tank Pressure Control Solenoid Low Input

Possible causes – Fuel Tank Pressure Control Solenoid harness is open or shorted– Fuel Tank Pressure Control Solenoid circuit poor electrical connection– Fualty Fuel Tank Pressure Control Solenoid Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

P0052 SUBARU HO2S21 Heater Control Circuit High

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…

P1516 SUBARU Idle Air Control Solenoid Signal 4 Circuit Low Input

Possible causes – Idle Air Control Solenoid valve harness is open or shorted – Idle Air Control Solenoid valve circuit poor electrical connection – faulty Idle Air Control Solenoid valve Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1516 SUBARU OBD Code Description The Idle Air Control Solenoid valve is incorporated in…

P0174 SUBARU System Too Lean Bank 2

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…

P1540 SUBARU Vehicle Speed Sensor Malfunction

Possible causes – Faulty Vehicle Speed Sensor– Vehicle Speed Sensor harness is open or shorted– Vehicle Speed Sensor circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1540 SUBARU OBD Code Description The Vehicle Speed Sensor 1 (Output Shaft Rotation Sensor) is mounted to the extension case (from the…