B2577 Diagnostic Trouble Code

B2577 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 B2577 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
Hesitation upon acceleration

Possible Causes :

Some aftermarket accessories and performance modifications
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.
An air leak forward of the DPF will change the sensor readings resulting in the code

Repair Processes :

If the engine displays a miss and there wasn't a code, determine which cylinder is misfiring. If the exhaust manifold is visible, spay or pour a small amount of water on each cylinder exhaust port. Water will evaporate immediately on good cylinders and slowly on the missing cylinder. If this can't be accomplished pull the plugs and check the condition. 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. It should be pretty close to battery voltage (12 volts). If not, then this is the circuit that has the problem.

Process Tips

Diagnostic trouble code B2577 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 B2577.

Fortunately, B2577 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B2577 Trouble Code For Specific Cars

B2577 Graf Und Stift Sp Passenger Door Unlock Switch Circuit Shorted to Ground
B2577 Dacia 1310 Fuel Temperature Sensor #2 Circuit Open
B2577 Alvis Silver Crest Air Bypass Valve System
B2577 Lada 112 Servo Motor Potentiometer Vent Circuit Short To Battery
B2577 Isdera 036
B2577 Mercedes-benz R Class Air Suspension Front Height Sensor High (SE) Signal Circuit Open
B2577 Infiniti G20 SCP (J1850) Invalid or Missing Data for Experimental #4