B3072 Diagnostic Trouble Code

B3072 is a kind of OBD-II Diagnostic B-Body Diagnostic Trouble Code.

It is considered generic because it applies to all makes and models of vehicles, although specific repair steps may be different depending on your car model.

Symptoms

Symptoms of a B3072 diagnostic trouble code may include:

Faulty or damaged wiring
The engine oil will exhibit dilution from the ECUs attempts to increase engine temperature. Some vehicles advance the fuel injection timing slightly after top center to afterburn a small amount of fuel to increase exhaust temperatures. Some of this fuel enters the crankcase. When the ECU determines the necessity to regenerate the DPF, the service life of the oil be shortened significantly
Poor fuel economy
Rich or lean exhaust

Possible Causes :

Faulty IMRC actuator relay (if equipped)
A large air leak at or near the number one oxygen sensor would also cause a lean mixture.
A large vacuum leak would cause a massive amount of un-metered air to enter the intake manifold resulting in an overly lean mixture.

Repair Processes :

Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors. Pull the connectors apart and carefully look at the terminals (the metal parts) inside the connectors. With the valve disconnected, the red voltmeter lead should be attached to the IMRC valve power wire and the black voltmeter lead connected to ground.

Process Tips

Diagnostic trouble code B3072 is not difficult to diagnose and repair. Thus, it always pays to have a qualified technician to look after your vehicle should this error code arise.

Diagnosing this code requires the engine to be in good running shape, without unmetered air entering the engine. If other codes that relates to misfiring condition, lean running or air entering the engine is present, then you must first fix those error codes before B3072.

Fortunately, B3072 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B3072 Trouble Code For Specific Cars

B3072 Holden Commodore Pedal Position Sensor C Circuit Intermittent
B3072 Mazda Etude Transponder Programming Failed
B3072 Durkopp 16 Hp Immobilizer Code Word/ID Number Write Failure
B3072 Maxwell Model H Transmission Range Sensor Circuit malfunction (PRNDL Input)
B3072 Suzuki X90 Mirror Driver Vertical Feedback Potentiometer Circuit Short to Ground
B3072 Triumph Vitesse Pedal Demand Sensor B Circuit High Input
B3072 Railton 16 Fuel Temperature Sensor A Circuit High Input