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1993 Pontiac Sunbird
January, 19, 2011 AT 12:21 PM
I tried to clear dtcs in my 1993 pontiac sunbird by removing the ecm fuse it was out overnight and the codes are still there please help
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January, 19, 2011 AT 1:19 PM
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.
January, 19, 2011 AT 9:42 PM
They were still there after clearing and before the car had been started again
January, 19, 2011 AT 9:46 PM
Yes, many codes can set immediately when the key is turned on.
January, 19, 2011 AT 11:21 PM
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
January, 19, 2011 AT 11:24 PM
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.
January, 19, 2011 AT 11:26 PM
What can I do to check things out myself I do have a scantool and also a digital multimeter 10megaohms
January, 19, 2011 AT 11:28 PM
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.
January, 19, 2011 AT 11:41 PM
Ok so my multimeter and my chilton manual just became my best friends
January, 19, 2011 AT 11:59 PM
How common is it for an ecm to go bad
February, 13, 2011 AT 4:46 AM
Ok I replaced the ecm but the codes are still there are they actually stored in the prom chip
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