Reset check engine light

[sfkjeld]

Originally Posted by JFP in PA

Reading, noting, and then clearing codes to see if they come back is common practice, but only if you have run the correct code diagnostics (in the case of the actuator, read run the electrical test) and found nothing. These cars do throw "ghost codes" that aren't real, but if a shop is regularly just clearing codes without further diagnostics that turn up nothing, they aren't doing their jobs.............

I’ve had two high porsche shops scan the car and they confirm the cam advance is ‘slow”. The code is correct. But as I said, in terms of measurable pollutants emitted during the smog test, my car runs quite clean (I’ve been told anyway). The smog test checks the exhaust at idle and at specific rpm. But evidently it doesn’t test the rate at which the cam advances.