C281D Buick Riviera OBD Code

OBD/2 C281D error code description and symptoms.

Variable Cam Timing Over-advanced (Bank 1) The comprehensive component monitor (CCM) monitors the VCT position for an over-advanced camshaft timing.
The test fails when the camshaft timing exceeds a maximum calibrated value or remains in an advanced position. Cam timing improperly set No oil flow to the VCT piston chamber Low oil pressure VCT solenoid valve stuck closed Camshaft advance mechanism binding (VCT unit) C281D DTC is a check of the VCT unit.

One example of this would be when an automatic vehicle in placed in gear. To prevent the added drag from the torque converter and transmission from reducing the idling speed, the PCM will command the idle control valve to allow more air to enter the engine, while at the same time, adjusting the injector pulse width to inject more fuel to suit the increased amount of air. Note that the idle air control valve is closed by the PCM when the throttle plate is opened to prevent excess air from entering the engine.

C281D Buick Riviera Error Code Repair Process :

The scent may C281D signal oil or coolant leaking from their normally closed-loop systems, or it may indicate dangerous exhaust gases invading your car's interior. Car and truck exhaust contains toxic gases such C281D, so if the inside of your car memory set switch circuit open as if you were standing behind your car, get out and get it fixed. Fight the urge to take a little nap first. So sleepy. That's the carbon monoxide talking, friends. At least open a window on your way to the shop.

Common Causes of Buick Riviera C281D OBD2 Code

A common cause of code C281D is the failure of Memory Set Switch Circuit Open, but there are several other possible causes as well, such as ;

Camshaft advance mechanism binding (VCT unit)
Faulty Fuel injector
Intake Valve Timing Control Solenoid Valve harness is open or shorted
Clogged or faulty fuel injector (s)

C281D is a kind of Chassis Trouble Code

Diagnosing chassis noises can be one of the most frustrating problems technicians face. Fortunately, manufacturers have engineered noise, vibration and harshness (NVH) diagnostic techniques and equipment to find the source of the noise.

Engine OBD 2 Codes website is a freeware resource center for engine trouble codes.

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C281D Buick Riviera OBD Code

C281D Buick Riviera Error Code Repair Process :

Common Causes of Buick Riviera C281D OBD2 Code

C281D code for other Buick cars