Rick's Free Auto Repair Advice

Symptoms of a failing camshaft sensor

What are the symptoms of a failing camshaft sensor?

Since the camshaft sensor controls spark generation, a failed or failing sensor can cause starting and performance problems. For more information on the difference between a camshaft sensor versus a crankshaft sensor, see this post. Here are the symptoms of a failing camshaft sensor.

A failing camshaft sensor can cause:

Hard starting — engine will crank but has a hard time “firing up.” The problem may be consistent or may occur only when cold or hot. Either way, the engine cranks but won’t fire up.

No start — engine cranks but won’t fire up at all. No spark at spark plugs. If you remove a spark plug and it’s wet, that proves the crankshaft sensor is activating the fuel injectors. But if the camshaft sensor fails, the engine can’t get spark

Misfires — a weak signal from the camshaft sensor can cause misfires, lack of power and poor gas mileage

Check engine light — A failed camshaft sensor will trigger a check engine light. A camshaft related trouble code may be accompanied by misfire codes. In that case, fix the camshaft related code first.

Posted on by Rick Muscoplat

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