Quote:
Originally Posted by timqqt
By the way, the code happens every 200-300 miles. I am not sure why this happens so evenly. The same P1128/P1130 and very similar freeze frame.
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Codes like the ones you are getting are due to issues that are not immediately harmful to the catalytic converters. The OBDII system has to see same code logging event back to back over two driving cycles. The first time the system sees the event that would trigger your P1128 or P1130 code it logs the event and puts it in its memory as a pending code. if the same event happens on the next drive event or cycle it moves the code from pending code to a hard code and triggers your check engine light.
This is why you can erase some codes and they take some time to reappear.
If you were having an issue that was immediately harmful to the catalytic converter the OBDII system would trigger your check engine light on the first event.
A misfire is an example of such an issue.