C20E6 Diagnostic Trouble Code

C20E6 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 C20E6 diagnostic trouble code may include:

Faulty or damaged wiring
The engine oil will exhibit dilution from the ECUs attempts to increase engine temperature. Some vehicles advance the fuel injection timing slightly after top center to afterburn a small amount of fuel to increase exhaust temperatures. Some of this fuel enters the crankcase. When the ECU determines the necessity to regenerate the DPF, the service life of the oil be shortened significantly
Poor fuel economy
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.

Possible Causes :

An air leak forward of the DPF will change the sensor readings resulting in the code
Rusty exhaust systems, cracked exhaust manifolds or damaged or missing gaskets or donuts will cause air leaks.
A large vacuum leak would cause a massive amount of un-metered air to enter the intake manifold resulting in an overly lean mixture.

Repair Processes :

Check to make sure they are not burnt or corroded. If in doubt, get some Electrical Contact cleaner at any parts store if cleaning of the terminals is needed. 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.

Process Tips

Diagnostic trouble code C20E6 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 C20E6.

Fortunately, C20E6 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C20E6 Trouble Code For Specific Cars

C20E6 Edsel Ranger Injection Control Pressure Out Of Range High
C20E6 Abarth 2400 4x4 Low Switch Error
C20E6 Lancia Ionos Speed Wheel Sensor RF Input Short Circuit To Battery
C20E6 Bmw 7 Climate Control A/C Pressure Switch Circuit Failure
C20E6 Infiniti Qx4
C20E6 Pontiac Sunfire Four Wheel Drive (4WD) Switch Circuit
C20E6 Isuzu I-370 SCP (J1850) Invalid or Missing Data for Traction Control