P211B Diagnostic Trouble Code

P211B is a kind of OBD-II Diagnostic P-Powertrain 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 P211B diagnostic trouble code may include:

Possible spark knock (detonation / pre-ignition)
Poor fuel economy
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
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected

Possible Causes :

Fuel with a large percentage of sulfur will clog the DPF quickly
The Mass Airflow sensor will also cause this problem. Mass Airflow circuit malfunction.
Defective ECU strategies or components will prevent proper regeneration

Repair Processes :

Look for damage to the tank indicating impact that may have damaged the fuel pump or sender. 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 P211B 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 P211B.

Fortunately, P211B is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P211B Trouble Code For Specific Cars

P211B Mitsubishi Eclipse Autolamp Delay Circuit Open
P211B Dodge 600 Ignition Coil B Primary Circuit Malfunction
P211B Morgan Aero B-pillar Power Sliding Door Open/Close Switch Input Ckt Short to Gnd
P211B Mercedes-benz 400 Air Bag Passenger Pressure Switch Circuit Short To Ground
P211B Rover 45
P211B Mercedes Citan ABS Inlet Valve Coil Rear Circuit Short To Battery
P211B Ginetta G21 Oil Temperature Sensor Circuit Failure