C3891 Volvo 960 OBD Code

OBD/2 C3891 error code description and symptoms.

Vehicle Speed Sensor (VSS) Intermittent Indicates the powertrain control module (PCM) detected an error in the vehicle speed information. Vehicle speed data is received from either the vehicle speed sensor (VSS), transfer case speed sensor (TCSS), anti-lock brake system (ABS) control module, generic electronic module (GEM), or central timer module (CTM). This DTC is set the same way as C3891. However, it is intended to flash the transmission control indicator lamp (TCIL) for first time VSS circuit error/malfunctions. Refer to possible causes for C3891

Gear changes are accomplished by a command from the TCM to energize the clutch actuator to release the clutch; after which various actuators inside the transmission disengage the current gear, and depending on current operating conditions, engage the next higher or lower gear ratio. All of this happens much faster than a human driver could change gears, and in most applications, gear changes are as smooth and seamless as on any fully automatic transmission.

C3891 Volvo 960 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 960 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 ;

EVAP system hose leaking
Faulty Mass Air Flow (MAF) sensor
Damaged camshaft position (CMP) sensor
Damaged ECM

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 960 OBD Code

C3891 Volvo 960 Error Code Repair Process :

Common Causes of Volvo 960 C3891 OBD2 Code

C3891 code for other Volvo cars