C1043 Diagnostic Trouble Code

C1043 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 C1043 diagnostic trouble code may include:

Faulty O2 Sensor
Lack of power
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
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

Possible Causes :

Defective ECU strategies or components will prevent proper regeneration
The Mass Airflow sensor is a hot wire that senses the volume of air entering the intake manifold. The computer uses this information to control fuel mixture.
Fuel with a large percentage of sulfur will clog the DPF quickly

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 you find a related TSB, the information will often help in diagnosing the code in question as TSBs are crested from many thousands of repairs. Oxygen sensors signal the engine management computer the amount of oxygen present in the exhaust, which is used in determining and controlling the fuel ratio.

Process Tips

Diagnostic trouble code C1043 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 C1043.

Fortunately, C1043 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C1043 Trouble Code For Specific Cars

C1043 Dodge Colt Ignition Coil D Primary/Secondary Circuit Malfunction
C1043 Toyota Sport Passenger Airbag Disable Module Sensor Obstructed
C1043 Nissan 400 Climate Control A/C Lock Sensor Failure
C1043 Opel Corsa E Diagnostic Lamp Driver Fault
C1043 Lancia Aprilia Speed Wheel RR Input Signal Missing
C1043 Infiniti M45
C1043 Chevrolet Epica Drivers Seat Belt Buckle Switch Circuit Short to Battery