C256A Pontiac 1000 OBD Code

OBD/2 C256A 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) C256A DTC is a check of the VCT unit.

As long as the throttle plate remains closed, the idling speed and quality is controlled by the PCM via the idle control valve, and as can be seen from the above it should be clear that idle control on a gasoline engine is a complex affair. For instance, if the engine is started in sub-zero temperatures, the PCM will command the idling control valve to allow less air to enter the engine to enrich the air/fuel mixture to create a condition which is roughly analogous to how chokes worked on carburetted engines to control idling in cold weather.

C256A Pontiac 1000 Error Code Repair Process :

For eic switch-1 assembly circuit failure check engine light is perhaps the most troubling of lights because it could mean so many different things, from you didn't screw the gas cap on tightly enough to look out for pistons flying through the hood and into the stratosphere. The easiest way to find out what this light is telling you is to hook your vehicle up to a scan tool. C256A error code diagnostic tool looks a little like an oversized calculator and plugs into a communication port inside the car. After you instruct it to perform the scan, it speaks eic switch-1 assembly circuit failure with your car's computers to find out exactly what's prompting the light to turn on.

Common Causes of Pontiac 1000 C256A OBD2 Code

A common cause of code C256A is the failure of EIC Switch-1 Assembly Circuit Failure, but there are several other possible causes as well, such as ;

Camshaft advance mechanism binding (VCT unit)
1Camshaft Position Sensor circuit poor electrical connection
EVAP canister or fuel tank leaks
Faulty Variable Camshaft Timing (VCT) position solenoid

C256A 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.

About Us | Contact | Privacy

C256A Pontiac 1000 OBD Code

C256A Pontiac 1000 Error Code Repair Process :

Common Causes of Pontiac 1000 C256A OBD2 Code

C256A code for other Pontiac cars