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Home >> Geo >> 1992 >> Prizm Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Diagnostic Code Charts (GSI) >> Code 53, Knock Control Signal, Faulty ECM
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Code 53, Knock Control Signal, Faulty ECM

Ensure that all ECM connectors are fully seated into the ECM. If connectors are fully seated, replace ECM. Start engine and recheck for code.

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