P1211 Diagnostic Trouble Code

P1211 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 P1211 diagnostic trouble code may include:

Faulty O2 Sensor
Lack of power
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
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.
Fuel with a large percentage of sulfur will clog the DPF quickly

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 P1211 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 P1211.

Fortunately, P1211 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P1211 Trouble Code For Specific Cars

P1211 Porsche 1300 Front Echo Sensor Circuit Failure
P1211 Dacia Nova Fuel Temperature Sensor A Circuit Performance
P1211 Datsun Bluebird HO2S Heater Control Circuit (Bank 1 Sensor 1)
P1211 Moretti 500 Battery Voltage High
P1211 Abarth 2400 4x4 Low Switch Error
P1211 Pontiac Star Chief Flash To Pass Switch Circuit Short To Ground
P1211 De Dion Bouton 6 Hp HO2S Heater Resistance (Bank 2 Sensor 2)