C3146 Diagnostic Trouble Code

C3146 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 C3146 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 :

Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.
Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)
Dirty air cleaner element Damaged DPF

Repair Processes :

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. 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 the scan tool has that capability, and the scan tool can operate the IMRC valves, then the problem is either resolved and a simple code clearing is all that's left or a new PCM would be called for.

Process Tips

Diagnostic trouble code C3146 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 C3146.

Fortunately, C3146 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

C3146 Trouble Code For Specific Cars

C3146 Nissan 1400 Child Seat Detection Circuit Open
C3146 Volkswagen T-roc SCP (J1850) Invalid or Missing Data for Body Status Request
C3146 Rolls-royce Corniche Hydraulic Pump Relay Circuit / Open
C3146 Rover 100 Idle Control System Malfunction
C3146 Art & Tech Sogna Air Suspension Rear Inflator Solenoid Output Circuit Short To Ground
C3146 Osca 2500 Door Unlock Disarm Output Circuit Failure
C3146 Jaguar Xkr Seat Driver Rear Down Circuit Open