B20EF Diagnostic Trouble Code

B20EF 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 B20EF diagnostic trouble code may include:

Engine surge
Blown fuse (if applicable)
Lack of power
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.
Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)

Repair Processes :

Look for missing ground strap or a rusty ground where the fuel tank is grounded to the frame. Check for damage to the wiring harness connector. Pack the connector cavity with dielectric silicone compound (same stuff they use for light bulb sockets and spark plug wires) and reassemble.

Process Tips

Diagnostic trouble code B20EF 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 B20EF.

Fortunately, B20EF is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B20EF Trouble Code For Specific Cars

B20EF De Soto Fireflite Hood Switch Circuit Short To Ground
B20EF Nissan Mm Compressor Failure
B20EF Aston Martin Sports Air Suspension Vent Solenoid Output Circuit Short To Battery
B20EF Buick Xp Damper Low Side Front Circuit Failure
B20EF Izh Oda Seat Direction Switch Assembly Circuit Short To Ground
B20EF Cadillac Cimarron Decklid Ajar Rear Door Circuit Open
B20EF Bentley S2 Battery Voltage High