C3999 Volkswagen 1302 OBD Code

OBD/2 C3999 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 C3999. However, it is intended to flash the transmission control indicator lamp (TCIL) for first time VSS circuit error/malfunctions. Refer to possible causes for C3999

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.

C3999 Volkswagen 1302 Error Code Repair Process :

When you turn on the ignition, the Service Engine Soon or Check Engine C3999 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 gate solenoid output circuit short to battery 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 gate solenoid output circuit short to battery.

Common Causes of Volkswagen 1302 C3999 OBD2 Code

A common cause of code C3999 is the failure of Air Suspension Gate Solenoid Output Circuit Short To Battery, but there are several other possible causes as well, such as ;

EVAP system hose leaking
1Camshaft Position Sensor circuit poor electrical connection
Air fuel ratio (A/F) Sensor 1 Bank 1 harness is open or shorted
Open circuits caused by corrosion of electrical connectors.

C3999 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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C3999 Volkswagen 1302 OBD Code

C3999 Volkswagen 1302 Error Code Repair Process :

Common Causes of Volkswagen 1302 C3999 OBD2 Code

C3999 code for other Volkswagen cars