C279A Citroen Jumper OBD Code

OBD/2 C279A error code description and symptoms.

Catalytic converters must be warm before they can work properly. On a cold start the PCM provides a rich mixture to keep the cold engine running.
All that extra fuel goes into the catalytic converter. But the exhaust isn't very hot, because, ah, the engine is pretty cold. GM has employed several strategies to fire up the catalytic converter quicker and reduce cold start emissions. One way is to use a secondary air pump that pumps outside air directly into the catalytic converter.

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.

C279A Citroen Jumper Error Code Repair Process :

If your decklid punch-out sensor ground short check engine light is illuminated, it's best to take it in for diagnostic testing, which can feel like a hassle. Because while the lights vary in appearance from vehicle to vehicle, all have the same basic meaning: There's a problem with the car's emissions system. The on-board diagnostics system C279A and engine control unit are in charge of monitoring a bunch of different decklid punch-out sensor ground short, and if they get a reading that's a little out of whack, up pops the check engine light.

Common Causes of Citroen Jumper C279A OBD2 Code

A common cause of code C279A is the failure of Decklid Punch-Out Sensor Ground Short, but there are several other possible causes as well, such as ;

Dirty Oil
Faulty Camshaft Position Sensor
Incorrect fuel filler cap used
Camshaft advance mechanism binding (VCT unit)

C279A 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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C279A Citroen Jumper OBD Code

C279A Citroen Jumper Error Code Repair Process :

Common Causes of Citroen Jumper C279A OBD2 Code

C279A code for other Citroen cars