B2056 Diagnostic Trouble Code

B2056 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 B2056 diagnostic trouble code may include:

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
Faulty or damaged wiring
Hesitation upon acceleration
Engine surge

Possible Causes :

Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)
Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.
Defective ECU strategies or components will prevent proper regeneration

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 the scan tool has that capability, and the scan tool can operate the IMRC valves, then the problem is either resolved and a simple code clearing is all that's left or a new PCM would be called for.

Process Tips

Diagnostic trouble code B2056 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 B2056.

Fortunately, B2056 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B2056 Trouble Code For Specific Cars

B2056 Lada Natacha Shift Solenoid B Electrical/2-3 Shift Solenoid Circuit Electrical
B2056 Mercedes Sl 500 Air Bag Crash Sensor #2 Feed/Return Circuit Short To Battery
B2056 Ford Fairlane
B2056 Trident Iceni Passenger Side Satellite Communication Circuit Short to Ground
B2056 Ballot 2-litre B Camshaft Position - Actuator Circuit (Bank1)
B2056 Sunbeam Venezia Mass or Volume Air flow Circuit High Input
B2056 Ford E-series Memory #1 output Short to Ground