Quote:
Originally Posted by Milk 1027
If you have a different ECM than from factory, yes.
ECM's are tracked from factory and they know which serial number goes into which VIN on cars.
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Follow the scenario.
John's car comes with ECM 1. John buys ECM 2.
John gets headers, exhaust, intake, and a tune on ECM 2. ECM 1 sits in the garage.
John needs to visit the dealer. John reinstalls ECM 1. ECM 2 sits in the garage.
ECM 1 came with the car. The dealer scans ECM 1. Will the dealer detect a problem with ECM 1 or the potentially warranty-voiding presence of ECM 2?