Question about Febi 2009 - 2009 Audi A4 Quattro Engine Coolant Temperature Sensor O-Ring
The car drives fine to me, but the check engine light just keep coming on I've replaced the catalytic converter, 02 sensor, and new spark plugs
Richard, did you do what you did based on diagnosis?
Try your fuel tank cap. Make sure it is closed securely.
Posted on Mar 19, 2014
The check engine light indicates that your engine computer has something it wants to tell you. Usually, what it wants to tell you is that a sensor reading is out of range, and there are a lot of sensors beyond just the oxygen sensor. When the check engine light comes on, you should get the codes "scanned" to get the details. I recommend you take it to a local auto parts store that does free code scanning. In my region, Advance Auto Parts provides this service. You could take it to your dealer, but they're going to severely overcharge for the code scan and probably try to scare you into letting them fix it.
A code scan will tell you exactly why the computer thinks something is wrong and will do a great deal to help you locate the real problem.
Posted on Mar 18, 2014
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Posted on Jan 02, 2017
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