Q: Engine running rough

asked by on March 22, 2016

The ABS light comes on while driving, and the engine is running rough.

Hello! The running rough symptom on your particular vehicle is commonly caused by a clogged or faulty VCT (Variable Control Timing) solenoid. The solenoid uses oil pressure to determine if the timing needs to be adjusted. The oil is filtered through the sensor by a screen and the screen becomes clogged overtime which hinders the sensor from getting a proper reading. The sensor then adjust the timing in unnecessary ways which will cause the engine to run rough.

If the sensor is determined not to be a fault then the rough running could be caused by a leaking vacuum line or aged spark plugs. The ABS (Anti-lock Brake System) light will be accompanied by a numeric code. I suggest that a technician retrieve the code from the ABS module because the code will help pinpoint the ABS issue. I recommend that the brake system is inspected by a certified mechanic. It is always best to have the brake system serviced by a brake ASE (Automotive Service Excellence) certified technician, such as one from YourMechanic.

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