P201C Diagnostic Trouble Code

P201C 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 P201C diagnostic trouble code may include:

Engine surge
Blown fuse (if applicable)
Lack of power
Diminished fuel efficiency

Possible Causes :

The Mass Airflow sensor is a hot wire that senses the volume of air entering the intake manifold. The computer uses this information to control fuel mixture.
Defective ECU strategies or components will prevent proper regeneration
Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)

Repair Processes :

Replace the oxygen sensor that is downstream from the catalytic converter on the side of the engine that does not contain cylinder #1. Also, if a oxygen sensor code stating "heater circuit malfunction" the sensor has most probably failed. 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. Pack the connector cavity with dielectric silicone compound (same stuff they use for light bulb sockets and spark plug wires) and reassemble.

Process Tips

Diagnostic trouble code P201C 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 P201C.

Fortunately, P201C is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P201C Trouble Code For Specific Cars

P201C Audi A6 ANTI THEFT HORN OUTPUT CIRCUIT Failure
P201C Plymouth Turismo Exhaust Gas Recirculation Flow Excessive Detected
P201C Peugeot 107 Dynamic Stability Control Right Front Valve Malfunction
P201C Mega Track A/C Relay Circuit Malfunction
P201C Bizzarrini Gt Brake Switch Malfunction
P201C Holden Hj Power Door Memory Lock Relay Circuit Short To Battery
P201C Ferrari 126 Injector Circuit Open / Shorted - Cylinder #6