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mpower22
02-07-2006, 04:56 PM
I reset my ecu with my accessport and cleared a code....is there any scantool that can read this "historical" cel?

x99percent
02-07-2006, 06:19 PM
"Historical" means that the CEL went away (the light went off), but the ECU wasn't reset.

Resetting the ECU clears all CELs and learned information (e.g. fuel trims).