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Intermittent Check Engine Light - No Error Codes! 700 1990

Additional info (unable to edit for some reason): After replacing the TPS, my idle has been great. Previously it was very poor, especially after warm - but, here's the possible relation: at that time when the TPS was bad, I didn't get *any* Check Engine Light or error codes.

And now that the TPS has been replaced, I still don't get error codes at the OBD sensor 1 or 2, but my Check Engine light periodically illuminates, and regularly at start-up.

Thanks!

JLS






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