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Home › Chevrolet › 2001 › Prizm Base, Standard › Repair and Diagnosis › Engine Performance › System › Engine Controls Self-Diagnostics - 1.8L › Diagnostic Tests › DTC P0135: Ho2S Heater Performance - Sensor 1 › Code Enable Criteria

Code Enable Criteria

Engine is running.
HO2S-1 heater is operating and heater current exceeds 2 amps.
HO2S-1 heater is operating and heater current is .2 amp or less.