C209E Diagnostic Trouble Code

C209E 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 C209E diagnostic trouble code may include:

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
Faulty or damaged wiring
Hesitation upon acceleration
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.
Defective ECU strategies or components will prevent proper regeneration

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. Pack the connector cavity with dielectric silicone compound (same stuff they use for light bulb sockets and spark plug wires) and reassemble.

Process Tips

Diagnostic trouble code C209E 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 C209E.

Fortunately, C209E is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C209E Trouble Code For Specific Cars

C209E Bmw Touring Coast Clutch Solenoid Circuit Malfunction
C209E Tesla S Mismatched PCM and/or ABS-TC Module
C209E Subaru Forester 2 Left Front Wheel Pressure Reduction Performance Problem
C209E Lotus Elise 111r Traction Control Disable Lamp - Circuit Short to Battery
C209E Mercedes Cl Class ABS Inlet Valve Coil RR Circuit Failure
C209E Chevrolet Alero Driver Door Ajar Circuit Failure
C209E Fiat Stilo LED #1 Circuit Short to Battery