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Home › Oldsmobile › 1998 › Regency › Repair and Diagnosis › Engine Performance › System › Engine Control Systems Tests W/Codes › Diagnostic Trouble Codes › DTC P1134 - Ho2S Transition Time Ratio Sensor 1 › Diagnostic Aids

Diagnostic Aids

Check HO2S 1 heater operation. If HO2S 1 heater operation is okay, replace HO2S 1.

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