2006 Chevy Aveo P0340 and P0016 Fault: Camshaft and Crankshaft Timing Issues
My 2006 Chevrolet Aveo has been experiencing recurring engine problems, recently showing diagnostic trouble codes P0340 and P0016. These codes relate to the camshaft and crankshaft position sensors, leading to symptoms such as loss of power, difficulty accelerating, high initial revs at startup, and noticeable idle jerking. I previously replaced the timing belt, spark plugs, wiring, and other related components a year ago after a coolant housing explosion. All mechanical inspections have been completed, and technicians confirmed that all parts appear to be in good condition. A mechanic suggested replacing the Powertrain Control Module (PCM), but stated it may not resolve the underlying issue. I'm seeking further advice on potential causes and solutions. Any insights into diagnosing or fixing these codes would be greatly appreciated.
The camshaft timing might be incorrect, and the Cam Position Sensor (CMP) could be faulty. When examining waveforms from both CMP and CKP sensors, an intermittent signal may indicate a problem. I recommend using an OBD2 scanner to check camshaft synchronization or correlation, as well as any detected offset between the cam and crankshaft signals. This can help confirm if there's a timing misalignment issue.