Engine light on. Put on machine and it said it was cam sensor . My car don't even have one on it .
SOURCE: how do you check and change a camshaft position
The camshaft sensor wouldn't explain the clattering noise. But a timing chain would explain both. Clattering from a loose chain and the camshaft sensor code from when the chain broke and the camshafts stopped turning.
SOURCE: Where is the camshaft position sensor located-99 Chevy Lumina 3.1
It's held down by one bolt right above the timing chain cover. It's next to the head that's facing toward the front of the car.
SOURCE: camshaft position sensor location
At the right rear of the engine under the intake manifold and to the left of the oil filter. You will probably need to go under the car to spot it, it's the sensor with a three-wire connector arranged vertically. But you can take it out from above. It's held in with a single bolt with an eight MM head located just above the sensor. Un-clip and remove the electrical connector. Unscrew the bolt with a socket wrench & extension bar. Wiggle and pull the sensor out.
here is a picture.
SOURCE: Camshaft Position Sensor Location
IF U GO TO THE RIGHT SIDE OF THE ENGINE AND LOOK 4 INCHES BEHIND THE BELT IT WILL BE ON TOP OF THE TIMING COVER.THE WIRES WILL BE RED/WHITE,BLACK,BROWN/WHITE
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