B2236 Diagnostic Trouble Code

B2236 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 B2236 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
Rich or lean exhaust

Possible Causes :

Faulty IMRC actuator relay (if equipped)
A large air leak at or near the number one oxygen sensor would also cause a lean mixture.
Defective ECU strategies or components will prevent proper regeneration

Repair Processes :

Use the DVOM to test resistance and continuity on all system circuits if actuator and sensor resistance levels are in compliance with manufacturer's specifications. 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.

Process Tips

Diagnostic trouble code B2236 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 B2236.

Fortunately, B2236 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B2236 Trouble Code For Specific Cars

B2236 Mercedes-benz 290 Air Bag Passenger Circuit Short To Ground
B2236 Fiat Punto Evo Lamp Warning Relay Circuit Open
B2236 Alvis Tc21 Air Suspension Disable Switch Circuit Failure
B2236 Renault Torpedo HO2S Heater Control Circuit High (Bank 1 Sensor 1)
B2236 Rolls-royce 100 Hydraulic Pressure Sensor Range/Performance
B2236 Case Y Door Ajar Lamp Circuit Open
B2236 Buick Bengal Cylinder 5 Injector Circuit Low