- 03-13-14 08:55 PM #1Cadillac Owners Fanatic
- Automobile(s): 2004 CTS 3.6 , 74 chevy caprice
- Join Date
- Jan 2012
- California, desert empire
reflashing ECM 2004 3.6 cts P0443
Ive replaced the purge valve ,canister vent valve , gas cap but the code comes on after cleared on next ignition cycle. Service manual says it should take 3 fails test before CEL on.
Im thinking bad ecm
Can the ecm need to be reflashed?
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