P1043 Diagnostic Trouble Code

P1043 is a kind of OBD-II Diagnostic P-Powertrain 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 P1043 diagnostic trouble code may include:

Blown fuse (if applicable)
Engine surge
Reduction in engine performance, especially at low RPM levels
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.
Dirty air cleaner element Damaged DPF

Repair Processes :

It should be pretty close to battery voltage (12 volts). If not, then this is the circuit that has the problem. 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 P1043 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 P1043.

Fortunately, P1043 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P1043 Trouble Code For Specific Cars

P1043 Mercedes Cl 500 ABS Inlet Valve Coil RF Circuit Failure
P1043 Peugeot Peugette Engine Coolant Temperature Circuit High Input
P1043 Triumph 1300 Passenger Window Up / Down Power Circuit Short to Ground
P1043 Fiat Doblo Lamp Park Input Circuit Failure
P1043 Ford Versailles Module Supply Voltage Out Of Range
P1043 Lotec Sirius Torque Converter Clutch Circuit Malfuction
P1043 Subaru Rex License Lamp Circuit Short to Battery