C2251 Mazda Etude OBD Code

OBD/2 C2251 error code description and symptoms.

Output Shaft Speed sensor circuit intermittent failure The output shaft speed sensor signal to the PCM is irregular or interrupted.
Harness connector not properly seated Harness intermittently shorted, or open Harness connector damaged OSS sensor damaged, or not installed properly Verify harness and connector integrity Verify OSS sensor proper installation.

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 Etude 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 Etude 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 Position Sensor harness is open or shorted
Erratic camshaft position due to low oil pressure
Ignition coils harness is open or shorted
Incorrect fuel pressure

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 Etude OBD Code

C2251 Mazda Etude Error Code Repair Process :

Common Causes of Mazda Etude C2251 OBD2 Code

C2251 code for other Mazda cars