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Originally Posted by BNaylor
Disconnecting the battery negative will not clear that DTC and the SES/CEL light. You need an odb-ii scan tool/scanner to properly reset a PCM module. Other option is to drive it for a few drive cycles and then see if it clears when the PCM runs the EGR test.
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That is EXACTLY what I had to do with mine a few months ago and I've had no problems ever since.