C0033 Diagnostic Trouble Code

C0033 is a kind of OBD-II Diagnostic C-Chassis 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 C0033 diagnostic trouble code may include:

Malfunction Indicator Lamp (MIL) illuminated
Carbon Buildup on O2 Sensor
Poor fuel economy
Rich or lean exhaust

Possible Causes :

The Mass Airflow sensor will also cause this problem. Mass Airflow circuit malfunction.
Fuel with a large percentage of sulfur will clog the DPF quickly
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.

Repair Processes :

Look for damage to the tank indicating impact that may have damaged the fuel pump or sender. If the engine displays a miss and there wasn't a code, determine which cylinder is misfiring. If the exhaust manifold is visible, spay or pour a small amount of water on each cylinder exhaust port. Water will evaporate immediately on good cylinders and slowly on the missing cylinder. If this can't be accomplished pull the plugs and check the condition. 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 C0033 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 C0033.

Fortunately, C0033 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C0033 Trouble Code For Specific Cars

C0033 Porsche 3400 Front Fog Lamp Relay Ckt Short to Battery
C0033 Chevrolet Citation Driver Rear Door Ajar Circuit Open
C0033 Jaguar Xk-8 Seat Driver Occupied Switch Circuit Short To Ground
C0033 Pontiac Grand Am Exhaust Valve Control Solenoid Circuit Low (Bank 2)
C0033 Porsche 901 Front Wiper Motor Relay Circuit Open (changed from Failure 2/6/97)
C0033 Mitsubishi Galant Autolamp Delay Increase Circuit Failure
C0033 Fiat Stilo LED #1 Circuit Short to Battery