C2240 Diagnostic Trouble Code

C2240 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 C2240 diagnostic trouble code may include:

Hesitation upon acceleration
Excessive exhaust leak
Rich or lean exhaust
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.
Some aftermarket accessories and performance modifications

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. Look at the plug wires to make sure they are not burnt or laying on the exhaust.

Process Tips

Diagnostic trouble code C2240 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 C2240.

Fortunately, C2240 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C2240 Trouble Code For Specific Cars

C2240 Mclaren M A/C Refrigerant Temperature Circuit High
C2240 Datsun On-do HO2S Heater Control Circuit (Bank 2 Sensor 2)
C2240 Kia Visto Servo Motor Defrost Circuit Failure
C2240 Ghia 1500 Oil Change Reset Button Circuit Failure
C2240 Fiat Stilo LED #1 Circuit Short to Battery
C2240 Toyota Noah Over Temperature Fault
C2240 Darracq 8 Heated Catalyst Temperature Below Threshold (Bank 1)