C3891 Volvo 140 OBD Code

OBD/2 C3891 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) C3891 DTC is a check of the VCT unit.

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.

C3891 Volvo 140 Error Code Repair Process :

When you turn on the ignition, the Service Engine Soon or Check Engine C3891 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 air suspension height sensor power circuit failure 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 air suspension height sensor power circuit failure.

Common Causes of Volvo 140 C3891 OBD2 Code

A common cause of code C3891 is the failure of Air Suspension Height Sensor Power Circuit Failure, but there are several other possible causes as well, such as ;

Camshaft advance mechanism binding (VCT unit)
EVAP canister or fuel tank leaks
Faulty Intake Valve Timing Control Solenoid Valve
Variable Valve Timing (VVT) circuit is open or shorted

C3891 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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C3891 Volvo 140 OBD Code

C3891 Volvo 140 Error Code Repair Process :

Common Causes of Volvo 140 C3891 OBD2 Code

C3891 code for other Volvo cars