C202A Diagnostic Trouble Code

C202A 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 C202A diagnostic trouble code may include:

Poor acceleration
Cherry red hot catalytic converter
Possible spark knock (detonation / pre-ignition)
Engine surge

Possible Causes :

Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)
Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.
A large air leak at or near the number one oxygen sensor would also cause a lean mixture.

Repair Processes :

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. 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. 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 C202A 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 C202A.

Fortunately, C202A is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C202A Trouble Code For Specific Cars

C202A Lanchester 23 Speed Control Output Circuit Continuity
C202A Railton Straight 8 Fuel Temperature Sensor A Circuit low Input
C202A Peugeot 5008 EIC Switch-1 Assembly Circuit Short To Ground
C202A Hyundai Starex SCP (J1850) Invalid or Missing Data for Electric Traction Drive (Inverter)
C202A Vauxhall Antara Power Window RR Motor Circuit Short To Battery
C202A Bentley 4-litre Battery Power Relay Circuit Failure
C202A Mercury Mc4 Air Suspension Rear Height Sensor High (SE) Signal Circuit Failure