B20DF Diagnostic Trouble Code

B20DF 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 B20DF diagnostic trouble code may include:

Excessive exhaust leak
Hesitation upon acceleration
Malfunction Indicator Lamp (MIL) illuminated
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.

Possible Causes :

An air leak forward of the DPF will change the sensor readings resulting in the code
Rusty exhaust systems, cracked exhaust manifolds or damaged or missing gaskets or donuts will cause air leaks.
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.

Repair Processes :

Now, clear the codes and test-drive the vehicle to see if the code is reset. 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.

Process Tips

Diagnostic trouble code B20DF 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 B20DF.

Fortunately, B20DF is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B20DF Trouble Code For Specific Cars

B20DF Peugeot 305 EGI Temperature Sensor Failure
B20DF Bristol 405 COURTESY LAMP OUTPUT Ckt Short to Battery
B20DF Holden Hd Power Door Memory Lock Relay Circuit Open
B20DF Citroen Jumper Fuel Pressure Regulator 1 Performance
B20DF Buick Wildcat Damper LF Circuit Short to Ground
B20DF Rover 2600 Ignition Coil - Cylinder 5 - Early Activation Fault
B20DF Lancia A112 Speed Wheel RF Comparison Failure