G3/3 (Left O2 sensor, before TWC [KAT]) : Voltage is too low. (P0150) G3/3 (Left O2 sensor, before TWC [KAT]) : Voltage is too low. (P0150) Possible cause: G3/3 (Left O2 sensor, before TWC [KAT]) Affected functions: Engine diagnosis Exhaust system Test 1: Check component G3/3 (Left O2 sensor, before TWC [KAT]). 1. Check component G3/3 (Left O2 sensor, before TWC [KAT]). Warning!Communication with ECU required.
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