P212C Diagnostic Trouble Code

P212C 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 P212C diagnostic trouble code may include:

The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
Faulty PCM
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
Diminished fuel efficiency

Possible Causes :

An air leak forward of the DPF will change the sensor readings resulting in the code
Rusty exhaust systems, cracked exhaust manifolds or damaged or missing gaskets or donuts will cause air leaks.
Fuel with a large percentage of sulfur will clog the DPF quickly

Repair Processes :

Check to make sure they are not burnt or corroded. If in doubt, get some Electrical Contact cleaner at any parts store if cleaning of the terminals is needed. Look for missing ground strap or a rusty ground where the fuel tank is grounded to the frame. Check for damage to the wiring harness connector. Look at the plug wires to make sure they are not burnt or laying on the exhaust.

Process Tips

Diagnostic trouble code P212C 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 P212C.

Fortunately, P212C is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P212C Trouble Code For Specific Cars

P212C Maybach W5 Transmission Transfer Case Clockwise Shift Relay Coil Short Circuit To Battery
P212C Honda Thats Reverse Input Circuit
P212C Jensen A Seat Driver Recline Forward Switch Circuit Failure
P212C Ferrari 158 Injector Control Pressure Above Expected Level
P212C Abarth Ot 1000 A/C Evaporator Air Temperature Circuit Range/Performance
P212C Mazda Sport A/C Cycling Period Too Short
P212C Apperson 6 Air Suspension LR Air Compress Request Exceeded Max Timing