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Home >> Audi >> 1994 >> 90 CS Quattro >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Self-Diagnostic System >> Diagnosing Codes >> 00535 (2141), Knock Sensor I Control

00535 (2141), Knock Sensor I Control

Engine may run rough, exhibit slight loss of power or exhibit increased fuel consumption. Maximum vehicle speed may be decreased. Check for low-octane fuel, loose knock sensor, faulty wiring or faulty ECM.