P133C Diagnostic Trouble Code

P133C 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 P133C diagnostic trouble code may include:

Blown fuse (if applicable)
Engine surge
Reduction in engine performance, especially at low RPM levels
Malfunction Indicator Lamp (MIL) illuminated

Possible Causes :

A faulty oxygen sensor. This will set a code in itself, however, a faulty oxygen sensor does not automatically condemn the sensor. The code just means that the sensor signal was not within specifications. An air leak or any of the above will cause an erroneous signal. There is a multitude of O2 codes relating to O2 performance which gives a clue to the problematic area.
Some aftermarket accessories and performance modifications
Dirty air cleaner element Damaged DPF

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 P133C 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 P133C.

Fortunately, P133C is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P133C Trouble Code For Specific Cars

P133C Vauxhall Meriva B Pressure Control Solenoid B Control Circuit Range/Performance
P133C Mazda Midge Turbocharger Boost Sensor B Circuit Low
P133C Peugeot Bebe Electronic Throttle Monitor Data Available
P133C Mercedes Cls 320 ABS Outlet Valve Coil RF Circuit Open
P133C Volkswagen Caddy 3 RESCU/VEMS Input Circuit Short to Battery
P133C Nissan Elgrand Clutch Pedal Switch B Circuit High
P133C Datsun 2300 High Mount Stop Lamp Circuit Failure