This has variable valve timing. The VVT is run by oil pressure. A code can be the wrong viscosity oil, oil sludge or a bad VVT mechanism. The only way I'd even think about this vehicle is after it's been inspected by a mechanic. Skip that you you buy this vehicle at your own risk.
SOURCE: 2002 Chevy Trailblazer Engine Codes
This is actually an easy swap out. Remove the electrical connection, remove the retaining bolt and pull out old one. I believe the sensor is located in the front passenger side of the engine on this particular model.
SOURCE: check engine light air Fuel mixture
When it comes on again let a regular shop scan it for you with a good scanner so they can see whats going on. a generic code reader wont do it. if it is stored in memory they can still check it. if the truck runs good idles fine just watch out for anything out of the norm , what about air filter and fuel filter have they been changed ? tune up ? air filters should be changed every 2 to 3 oil changes and fuel filter every 30k depending on fuel quality there. and tune up at 60 to 70 k even though they probaly said 100k.
SOURCE: The check engine light is on chevy cavalier 2001
The check engine light would record an error code in the computer, you need to get that information in order to know what the next step is.
SOURCE: My check engine light kept coming on and they
Could be a wiring issue, fuel cap got left off, fuel pressure sensor again or loose connection to the sensor and one of the other Evap hoses. Also might try changing the fuel cap. Look at the underside of the fuel cap and if there are cracks in the sealing rubber, replace the cap.
SOURCE: check engine light code came up p2101 throttle
There is either a high or low circuit problem with the motor. The ecm, or called the computor, moniters the cuircuit for the motor.
The best thing to do is have the control motor checked and the ecm. One of them is bad.
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