Here's why:
* Timing: The CMP sensor is crucial for the engine's timing. It tells the Engine Control Module (ECM) where the camshaft is in its rotation. If the sensor is faulty, the ECM receives inaccurate information, leading to incorrect fuel injection timing and spark timing.
* Lean Condition: Incorrect timing can lead to incomplete combustion. If the fuel isn't burning efficiently due to poor timing, the exhaust will appear lean (too much air relative to fuel). This is because the oxygen sensors will detect more oxygen in the exhaust than expected.
* Misfires: Inaccurate timing directly impacts combustion. If the spark plug fires at the wrong moment relative to the piston's position, a misfire occurs. This is easily detected by the ECM and will trigger a misfire code.
In short, the camshaft position sensor plays a vital role in precise engine operation. A malfunction will ripple through the system, manifesting as both lean codes and misfire codes. It's a common cause of these problems in older vehicles.
