C2981 Bmw B7 OBD Code

OBD/2 C2981 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 C2981. However, it is intended to flash the transmission control indicator lamp (TCIL) for first time VSS circuit error/malfunctions. Refer to possible causes for C2981

As long as the throttle plate remains closed, the idling speed and quality is controlled by the PCM via the idle control valve, and as can be seen from the above it should be clear that idle control on a gasoline engine is a complex affair. For instance, if the engine is started in sub-zero temperatures, the PCM will command the idling control valve to allow less air to enter the engine to enrich the air/fuel mixture to create a condition which is roughly analogous to how chokes worked on carburetted engines to control idling in cold weather.

C2981 Bmw B7 Error Code Repair Process :

When you turn on the ignition, the Service Engine Soon or Check Engine C2981 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 seat driver front down switch 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 seat driver front down switch circuit failure.

Common Causes of Bmw B7 C2981 OBD2 Code

A common cause of code C2981 is the failure of Seat Driver Front Down Switch Circuit Failure, but there are several other possible causes as well, such as ;

EVAP system hose leaking
Faulty Crankshaft Position Sensor (POS)
EVAP canister or fuel tank leaks
Foreign matter caught in fuel filler cap

C2981 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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C2981 Bmw B7 OBD Code

C2981 Bmw B7 Error Code Repair Process :

Common Causes of Bmw B7 C2981 OBD2 Code

C2981 code for other Bmw cars