C0200 Diagnostic Trouble Code

C0200 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 C0200 diagnostic trouble code may include:

Poor acceleration
Cherry red hot catalytic converter
Possible spark knock (detonation / pre-ignition)
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected

Possible Causes :

A large air leak at or near the number one oxygen sensor would also cause a lean mixture.
Faulty IMRC actuator relay (if equipped)
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.

Repair Processes :

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. 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. Oxygen sensors signal the engine management computer the amount of oxygen present in the exhaust, which is used in determining and controlling the fuel ratio.

Process Tips

Diagnostic trouble code C0200 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 C0200.

Fortunately, C0200 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C0200 Trouble Code For Specific Cars

C0200 Singer Vogue Invalid Test - Accelerator Pedal Movement
C0200 Studebaker Lark Lamp Turn Signal Right Circuit Short To Ground
C0200 Bentley 6.5-litre Battery Power Relay Circuit Open
C0200 Toyota Corolla O2 Sensor Circuit No Activity Detected (Bank 2 Sensor 1)
C0200 Lotus Elite Traction Control Input Signal Low
C0200 Opel Vivaro Door Lock Cylinder Circuit Failure
C0200 Frazer Nash Fast Not in P or N During KOEO / KOER