B3908 Alvis Firebird OBD Code

OBD/2 B3908 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 B3908. However, it is intended to flash the transmission control indicator lamp (TCIL) for first time VSS circuit error/malfunctions. Refer to possible causes for B3908

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.

B3908 Alvis Firebird Error Code Repair Process :

If your illuminated entry relay circuit open check engine light is illuminated, it's best to take it in for diagnostic testing, which can feel like a hassle. Because while the lights vary in appearance from vehicle to vehicle, all have the same basic meaning: There's a problem with the car's emissions system. The on-board diagnostics system B3908 and engine control unit are in charge of monitoring a bunch of different illuminated entry relay circuit open, and if they get a reading that's a little out of whack, up pops the check engine light.

Common Causes of Alvis Firebird B3908 OBD2 Code

A common cause of code B3908 is the failure of Illuminated Entry Relay Circuit Open, but there are several other possible causes as well, such as ;

EVAP system hose leaking
Faulty Intake Valve Timing Control Solenoid Valve
Fuel filler cap remains open or fails to close
Air fuel ratio (A/F) Sensor 1 Bank 1 circuit poor electrical connection

B3908 is a kind of Body Trouble Code

Auto body problems aren't always easy to spot. Diagnosing auto body problems sometimes requires a little know-how. In this section you'll find articles dedicated to teaching you how to diagnose auto body problems.

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

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B3908 Alvis Firebird OBD Code

B3908 Alvis Firebird Error Code Repair Process :

Common Causes of Alvis Firebird B3908 OBD2 Code

B3908 code for other Alvis cars