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how to tell if my ecu is bad???? my cel light wont shut off and i cant check thecodes

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Old 06-11-2012, 08:10 PM
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Default how to tell if my ecu is bad???? my cel light wont shut off and i cant check thecodes

my cel used to shut off after 2 seconds with the key on. now the light is on all the time and when i tried to jump the wires to check the codes on the dashboard nothing happend just stayed solid

how can i check my ecu to see if it shit out?
Old 06-11-2012, 09:34 PM
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location 8 on the main relay is the ecu ground and its not working. when i jump the #8 to a good ground the pump turns on but the car wont start
Old 06-12-2012, 04:29 AM
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almost like my problem, im still working on it though.. occasionally, when i turn the key forward the pump doesnt prime and the cel light stays on.. car will crank but wont turn over... i turn the key off turn it back on a few times and then the pump primes and the cel goes out.. other then that occasionally, I dont have a cel on..
Old 06-12-2012, 10:22 AM
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sounds like your main relay is going bad. same thing happened to my friends car last week
Old 06-12-2012, 01:57 PM
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it was the ecu
Old 07-19-2012, 01:22 PM
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yeah that happened to me, if you do the paperclip trick and the CEL stays solid. thats a code 0 meaning a fried ECU!! just swapped it to a P30 and its all good
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