C0218 Diagnostic Trouble Code

C0218 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 C0218 diagnostic trouble code may include:

Hesitation upon acceleration
Excessive exhaust leak
Rich or lean exhaust
Lack of power

Possible Causes :

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

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.

Process Tips

Diagnostic trouble code C0218 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 C0218.

Fortunately, C0218 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C0218 Trouble Code For Specific Cars

C0218 Mercedes S 65 Air Bag Crash Sensor #1 Feed/Return Circuit Short To Ground
C0218 Mg M-type Air Suspension Warning Lamp Circuit Open
C0218 Toyota Allion No Movement Detected After an Unlatch During Power Open
C0218 Seat 1500 Injector Circuit Malfunction - Cylinder 5
C0218 Suzuki Sx4 Mirror Driver Switch Assembly Circuit Open
C0218 Holden Fx Power Door Lock Circuit Short To Battery
C0218 Toyota Aygo O2 Sensor Circuit High Voltage (Bank 2 Sensor 1)