That probably means that they are hard codes and simply resetting immediately. You have to resolve/repair the code issues and not simply try to clear them.

Answered by Wrenchtech (expert)
14,716 answers provided

they were still there after clearing and before the car had been started again

Response from bmxwayne
10 questions asked

Yes, many codes can set immediately when the key is turned on.

Answered by Wrenchtech (expert)
14,716 answers provided

ok all seven of the codes i am getting according to my chilton manual are supposed to turn the mil light on but it is not does this mean my ecm is going out or what

Response from bmxwayne
10 questions asked

You never said you were getting that many codes. that does tend to point to a bad ECM but it should still be analyzed further.

Answered by Wrenchtech (expert)
14,716 answers provided

what can i do to check things out myself i do have a scantool and also a digital multimeter 10megaohms

Response from bmxwayne
10 questions asked

You're going to have to manually check out each one of those codes and determine if they are false codes or not and then verify all the power and ground supplies to the ECM.

Answered by Wrenchtech (expert)
14,716 answers provided

ok so my multimeter and my chilton manual just became my best friends

Response from bmxwayne
10 questions asked

how common is it for an ecm to go bad

Response from bmxwayne
10 questions asked

ok i replaced the ecm but the codes are still there are they actually stored in the prom chip

Response from bmxwayne
10 questions asked