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Discussion Starter · #1 ·
will i loose my check engine light codes if i disconnect my battery? i want to inspect the ecu harness due to no communication at the obd connector so i dont want to loose any check engine light codes. anybody know the answer? thanks car is 2003 saab 9-5 ARC
 

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will i loose my check engine light codes if i disconnect my battery? i want to inspect the ecu harness due to no communication at the obd connector so i dont want to loose any check engine light codes. anybody know the answer? thanks car is 2003 saab 9-5 ARC
yes u will lose the check engine code, why not have it read before deciding to disconnect the battery?
 
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Discussion Starter · #3 ·
car is having issues, it will not start, and im getting the data link error if i connect my scanner to the obd port. im guessing its the ecu, the cooling fans also turn on while the key is in the on position and car will crank but not start.
 
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