B2556 Diagnostic Trouble Code

B2556 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 B2556 diagnostic trouble code may include:

Misfire
Misfire
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
Engine surge

Possible Causes :

Rusty exhaust systems, cracked exhaust manifolds or damaged or missing gaskets or donuts will cause air leaks.
An air leak forward of the DPF will change the sensor readings resulting in the code
Defective ECU strategies or components will prevent proper regeneration

Repair Processes :

Check to make sure they are not burnt or corroded. If in doubt, get some Electrical Contact cleaner at any parts store if cleaning of the terminals is needed. Find out what kind of system you have and verify that voltage to the fuel level sensor is present at the fuel pump wiring harness.

Process Tips

Diagnostic trouble code B2556 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 B2556.

Fortunately, B2556 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B2556 Trouble Code For Specific Cars

B2556 Lifan X60 Throttle Control Unit Throttle Position Malfunction
B2556 Jeep Commander Seat Driver Rear Up Circuit Short To Battery
B2556 Subaru Alfa Led #1 Circuit Failure
B2556 Mazda 929 Transmission Transfer Case Contact Plate Power Circuit Failure
B2556 Toyota Carina O2 Sensor Circuit Malfunction (Bank 1 Sensor 1)
B2556 Porsche Gt3 Fuel Pump Secondary Circuit High
B2556 Mercedes-benz C Class Air Flow Blend Door Driver Circuit Failure