How do you know if your 1999 Volvo s80 2.9 engine needs a camshaft sensor?

You may need to replace the camshaft sensor in your 1999 Volvo S80 2.9 if you experience symptoms like rough idling, poor acceleration, or engine misfiring. Additionally, if the check engine light is illuminated, it can indicate a malfunctioning sensor, which can be confirmed by using an OBD-II scanner to check for related error codes. Unusual changes in fuel efficiency or difficulty starting the engine can also be signs that the camshaft sensor may need replacement.