1997 Plymouth Voyager 3.0L Engine P0300/P0302 Codes: Fixed After Crankshaft Position Sensor Cleaning
I've been experiencing recurring P0300 and P0302, P0304, P0306, P0301, P0302, and P0303 diagnostic trouble codes for several months while driving my 1997 Plymouth Voyager with a 3.0L engine. The check engine light typically activates during long-distance interstate driving. I previously replaced the spark plugs, ignition wires, rotor, and cap, but the issue persisted. I was planning to have the fuel injectors cleaned, so I decided to inspect the crankshaft position sensor. Upon inspection, I found a small amount of debris on the sensor. After cleaning it thoroughly and reinstalling it three days ago, the P0300 code has not returned. This experience may offer insight for others facing similar issues with the 1997 Plymouth Voyager's 3.0L engine and misfire-related codes.
This is a plausible solution—debris on the crankshaft position sensor can interfere with engine timing and trigger misfire codes like P0300 in older vehicles such as the 1997 Plymouth Voyager.