C2839 Diagnostic Trouble Code

C2839 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 C2839 diagnostic trouble code may include:

Possible spark knock (detonation / pre-ignition)
Poor fuel economy
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
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected

Possible Causes :

Fuel with a large percentage of sulfur will clog the DPF quickly
The Mass Airflow sensor will also cause this problem. Mass Airflow circuit malfunction.
Defective ECU strategies or components will prevent proper regeneration

Repair Processes :

Look for damage to the tank indicating impact that may have damaged the fuel pump or sender. Look at the plug wires to make sure they are not burnt or laying on the exhaust. Now, clear the codes and test-drive the vehicle to see if the code is reset.

Process Tips

Diagnostic trouble code C2839 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 C2839.

Fortunately, C2839 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C2839 Trouble Code For Specific Cars

C2839 Chevrolet Lacetti ECU A/D Converter
C2839 Toyota Avalon Ii O2 Sensor Circuit High Voltage (Bank 1 Sensor 1)
C2839 Mitsubishi Pajero Aux Heater Cool Down Time Exceeded (may be con to a453-5 )
C2839 Renault R5 Heated Wind Shield Relay Short to Vbatt (changed from Failure 2/6/97)
C2839 Saab Gt Ignition Tamper Circuit Short To Battery
C2839 Nissan Teana Cylinder #1 High To Low Side Open
C2839 Turner Climax Pedal Position Sensor C Circuit Low Input