B0654 Diagnostic Trouble Code

B0654 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 B0654 diagnostic trouble code may include:

Faulty O2 Sensor
Lack of power
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
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

Possible Causes :

Defective ECU strategies or components will prevent proper regeneration
The Mass Airflow sensor is a hot wire that senses the volume of air entering the intake manifold. The computer uses this information to control fuel mixture.
Fuel with a large percentage of sulfur will clog the DPF quickly

Repair Processes :

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. 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.

Process Tips

Diagnostic trouble code B0654 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 B0654.

Fortunately, B0654 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B0654 Trouble Code For Specific Cars

B0654 Amilcar C6 Air Suspension LF Corner Down Timeout
B0654 Volvo V40 SCP (J1850) Invalid or Missing Data for Exterior Environment
B0654 Reliant Gtc Gate Select Actuator Circuit / Open [left / right motion]
B0654 Ferrari 3z Intake Air Temperature Sensor 2 Circuit
B0654 Subaru Leone Left Rear Turn Lamp Circuit Short to Battery
B0654 Mitsubishi Nessie Aux Blower Sense Switch Circuit Failure
B0654 Opel Movano Door Ajar LR Circuit Short To Battery