C2251 Mazda Cx-5 OBD Code

OBD/2 C2251 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) C2251 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.

C2251 Mazda Cx-5 Error Code Repair Process :

For catalyst temperature sensor 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. C2251 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 catalyst temperature sensor failure with your car's computers to find out exactly what's prompting the light to turn on.

Common Causes of Mazda Cx-5 C2251 OBD2 Code

A common cause of code C2251 is the failure of Catalyst Temperature Sensor Failure, but there are several other possible causes as well, such as ;

Camshaft advance mechanism binding (VCT unit)
Faulty Intake Valve Timing Control Solenoid Valve
Faulty Mass Air Flow (MAF) sensor
Air fuel ratio (A/F) Sensor 1 Bank 1 circuit poor electrical connection

C2251 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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C2251 Mazda Cx-5 OBD Code

C2251 Mazda Cx-5 Error Code Repair Process :

Common Causes of Mazda Cx-5 C2251 OBD2 Code

C2251 code for other Mazda cars