C1959 Diagnostic Trouble Code

C1959 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 C1959 diagnostic trouble code may include:

Faulty PCM
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
Poor acceleration
Engine surge

Possible Causes :

Rusty exhaust systems, cracked exhaust manifolds or damaged or missing gaskets or donuts will cause air leaks.
An air leak forward of the DPF will change the sensor readings resulting in the code
A large air leak at or near the number one oxygen sensor would also cause a lean mixture.

Repair Processes :

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. Look for damage to the tank indicating impact that may have damaged the fuel pump or sender.

Process Tips

Diagnostic trouble code C1959 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 C1959.

Fortunately, C1959 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C1959 Trouble Code For Specific Cars

C1959 Citroen Ax Four Wheel Drive (4WD) Switch Circuit High
C1959 Audi 100 Alarm Panic Input Circuit Short To Ground
C1959 Isuzu Piazza
C1959 Steyr 126 Lamp Seat Belt Circuit Failure
C1959 Turner 1220 Pedal Position Sensor A Circuit Intermittent
C1959 Renault Laguna 2 Gyroscope Error
C1959 Sunbeam 12 MAF Sensor Out Of Self Test Range./KOER Not Able To Complete KOER Aborted