C3969 Trouble Code

View C3969 obd/2 error code description and symptoms. C3969 engine photo

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.

To check for an open circuit, trace along the length of the transmission control circuit, checking for breaks in the wiring. Repair any broken wiring and make sure all connectors are fully seated and locked.Pay close attention to connectors, looking for corrosion, bent or broken pins, or moisture in the connector. Repair any connector issues even if they are not specifically part of the transmission control circuit as they may serve a function in providing power to the transmission control circuit.

C3969 Error Code Repair Process :

For leakage fault 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. C3969 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 leakage fault with your car's computers to find out exactly what's prompting the light to turn on.

C3969 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.

Common Causes of C3969

A common cause of code C3969 is the failure of Leakage Fault, but there are several other possible causes as well, such as ;

Dirty Oil
Damaged camshaft position (CMP) sensor
Camshaft Position Sensor harness is open or shorted
Faulty variable valve timing (VVT)

C3969 code for all cars

You can view according C3969 DTC for your car model. We selected several models to see obd2 solutions click and view it.

+C3969 Ford Tourneo Connect

+C3969 Mini Paceman

+C3969 Bugatti Type 35

+C3969 Vauxhall Agila B

+C3969 Mercedes-benz Clk Class

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

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