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 Austin 20 Audio Tape Deck Mechanism Fault
P211B Holden Hk Power Door Memory Lock Relay Circuit Short To Ground
P211B Volkswagen Crosstouran RF LAMP HIGH BEAM CIRCUIT Short to Battery
P211B Aston Martin Virage Air Temperature External Sensor Circuit Open
P211B Yes! Roadster
P211B Pininfarina Blmc Engine Shutoff Solenoid Malfunction
P211B Skoda Popular Knock Sensor 2 Circuit Malfunction (Bank 2)