The Camshaft Position sensor will signal the Engine Control Module when the #1 cylinder is ready for the spark plug to fire (top-dead-center on compression stroke). The ECM uses the information from this sensor to help calculate fuel delivery and spark timing.
One example of this would be when an automatic vehicle in placed in gear. To prevent the added drag from the torque converter and transmission from reducing the idling speed, the PCM will command the idle control valve to allow more air to enter the engine, while at the same time, adjusting the injector pulse width to inject more fuel to suit the increased amount of air. Note that the idle air control valve is closed by the PCM when the throttle plate is opened to prevent excess air from entering the engine.
Difficulty Level (Expert)
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Repair Time (35 Min.)
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| Cost Prediction : $ 40-75 |
If your servo motor potentiometer foot circuit failure 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 B3812 and engine control unit are in charge of monitoring a bunch of different servo motor potentiometer foot circuit failure, and if they get a reading that's a little out of whack, up pops the check engine light.
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B3812 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. |
You can view according B3812 DTC for your car model. We selected several models to see obd2 solutions click and view it.
| +B3812 Mazda Chante | +B3812 Vauxhall Belmont | +B3812 Alpine Berlinette | +B3812 Isuzu 4200 | +B3812 Proton 300 |
Engine OBD 2 Codes website is a freeware resource center for engine trouble codes.
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