C1930 Diagnostic Trouble Code

C1930 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 C1930 diagnostic trouble code may include:

Poor acceleration
Cherry red hot catalytic converter
Possible spark knock (detonation / pre-ignition)
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.
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. 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 C1930 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 C1930.

Fortunately, C1930 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C1930 Trouble Code For Specific Cars

C1930 Bianchi S Brake Pedal Input Circuit Ground Short
C1930 Chrysler 180 Engine Oil Pressure Sensor/Switch Low Voltage
C1930 Tornado Typhoon Motor Relay # 1 Circuit Short to Battery
C1930 Talbot-lago 2500 Mirror Passenger Right/Left Motor Stalled
C1930 Buick Roadmaster Cylinder Head Temp Sensor Out Of Self Test Range
C1930 Simca 1307 Intake Manifold Runner Control Circuit Malfunction
C1930 Mazda Lantis Turbo Charge Relief Circuit Malfunction