U3963 Mercedes Sl 280 OBD Code

OBD/2 U3963 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) U3963 DTC is a check of the VCT unit.

Some systems require that the actuator has an adequate supply of brake fluid. Low brake fluid levels can mimic the symptoms of code U3963, so consult the manual to locate the brake fluid reservoir. Bear in mind that a low fluid level can set code U3963 on some applications, so make sure that on fluid operated systems the fluid level is up to the mark before starting an electrical diagnosis.

U3963 Mercedes Sl 280 Error Code Repair Process :

When you turn on the ignition, the Service Engine Soon or Check Engine U3963 light should flash briefly, indicating that the OBD system is ready to scan your vehicle for any malfunctions. After this brief flash, the light should stay off while you drive as long as no problems are detected. If fuel temperature sensor #1 circuit short to ground so, you'll be glad to know that your vehicle is equipped with an early warning system that could save you time, money, and fuel in addition to helping protect the fuel temperature sensor #1 circuit short to ground.

Common Causes of Mercedes Sl 280 U3963 OBD2 Code

A common cause of code U3963 is the failure of Fuel Temperature Sensor #1 Circuit Short to Ground, but there are several other possible causes as well, such as ;

Camshaft advance mechanism binding (VCT unit)
Faulty front heated oxygen sensor
Incorrect Positive Crankcase Ventilation (PCV) hose connection
Camshaft Position Sensor harness is open or shorted

U3963 is a kind of Network Trouble Code

U-code indicates that engine communication errors and shows lost communication with engine parts.U-Codes are fairly straight forward, given all of the articles and technical publications that have been written regarding these problematic codes. In most cases, it just comes down to identifying the module that isn't communicating with the other modules on the CAN bus line for whatever reason.

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

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U3963 Mercedes Sl 280 OBD Code

U3963 Mercedes Sl 280 Error Code Repair Process :

Common Causes of Mercedes Sl 280 U3963 OBD2 Code

U3963 code for other Mercedes cars