C3855 Trouble Code

OBD/2 C3855 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.

Some systems require that the actuator has an adequate supply of brake fluid. Low brake fluid levels can mimic the symptoms of code C3855, so consult the manual to locate the brake fluid reservoir. Bear in mind that a low fluid level can set code C3855 on some applications, so make sure that on fluid operated systems the fluid level is up to the mark before starting an electrical diagnosis.

Difficulty Level (Soso)
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Repair Time (50 Min.)
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Cost Prediction : $ 40-75

C3855 Error Code Repair Process :

If your transfer case contact plate c encoder circuit failure 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 C3855 and engine control unit are in charge of monitoring a bunch of different transfer case contact plate c encoder circuit failure, and if they get a reading that's a little out of whack, up pops the check engine light.

Wrench Tool C3855 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 C3855

A common cause of code C3855 is the failure of Transfer Case Contact Plate C Encoder Circuit Failure, but there are several other possible causes as well, such as ;

C3855 code for all cars

You can view according C3855 DTC for your car model. We selected several models to see obd2 solutions click and view it.

+C3855 Aston Martin Bulldog +C3855 Porsche 959 +C3855 Zagato Isocity +C3855 Ford Transit +C3855 Jowett 10
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