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Home >> Geo >> 1991 >> Prizm Base, 4D Hatchback, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> PRIZM GSi CODE CHARTS (VIN 5) >> Code 53, Knock Control Signal/Faulty ECM
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Code 53, Knock Control Signal/Faulty ECM

Fig 1: Code 53 Flow Chart, Knock Control Signal/Faulty ECM
G91D16827Courtesy of GENERAL MOTORS CORP.
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