B0441 Diagnostic Trouble Code

B0441 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 B0441 diagnostic trouble code may include:

The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
Faulty PCM
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
Reduction in engine performance, especially at low RPM levels

Possible Causes :

A faulty oxygen sensor. This will set a code in itself, however, a faulty oxygen sensor does not automatically condemn the sensor. The code just means that the sensor signal was not within specifications. An air leak or any of the above will cause an erroneous signal. There is a multitude of O2 codes relating to O2 performance which gives a clue to the problematic area.
Some aftermarket accessories and performance modifications
An air leak forward of the DPF will change the sensor readings resulting in the code

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. If all testing has passed so far yet you still have the same code, check your scan tool and see if it can open and close the IMRC valve. Look at the plug wires to make sure they are not burnt or laying on the exhaust.

Process Tips

Diagnostic trouble code B0441 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 B0441.

Fortunately, B0441 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B0441 Trouble Code For Specific Cars

B0441 Bmw 323 Central Lock Feedback Failure
B0441 Chrysler Sebring Ii Exhaust Gas Recirculation Flow Excessive Detected
B0441 Subaru B11 LED #1 Circuit Short to Battery
B0441 Ford Expedition 2 Memory 1 Switch Circuit Short To Battery
B0441 Innocenti Small SCP (J1850) Invalid or Missing Data for Interior Lamps
B0441 Saleen S Ignition/Distributor Engine Speed Input Circuit No Signal
B0441 Subaru Vivio Low Coolant Lamp Output Circuit Short to Battery