C3878 Trouble Code

OBD/2 C3878 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) C3878 DTC is a check of the VCT unit.

A good starting point in your diagnosis is checking all system fuses and fusible links. This can be done using the DVOM on the voltage setting. You will want to test the fuses with circuits loaded. Some fuses will appear normal until a load is placed on their respective circuit; at which point they will fail. This has been the cause of many 'phantom malfunctions'. Consult your vehicle information source for fuse and fusible link locations. If all fuses are in working order, you may want to check TCM relay operation by swapping identical relays. Usually the horn relay, starter relay, fuel pump relay, air conditioning clutch relay, and controller relays are similar enough in design to swap for diagnostic purposes.

Difficulty Level (Expert)
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Repair Time (60 Min.)
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Cost Prediction : $ 25-45

C3878 Error Code Repair Process :

For right rear center sensor circuit 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. C3878 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 right rear center sensor circuit fault with your car's computers to find out exactly what's prompting the light to turn on.

Wrench Tool C3878 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 C3878

A common cause of code C3878 is the failure of Right Rear Center Sensor Circuit Fault, but there are several other possible causes as well, such as ;

C3878 code for all cars

You can view according C3878 DTC for your car model. We selected several models to see obd2 solutions click and view it.

+C3878 Monteverdi Sierra +C3878 Moretti Coupe +C3878 Isuzu Asso +C3878 MG MGC +C3878 MG RV9
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