Check the 'Possible Causes' listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
The cost to diagnose the P0133 Subaru code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.
The response of the voltage signal from the sensor takes more than the specified time.
This sensor is a Zirconia type sensor, used to monitor exhaust gases for the presence of oxygen. Depending on the level of oxygen in the exhaust stream, the oxygen sensor can inform the Engine Control Module of a rich or lean fuel mixture condition. The Engine Control Module (ECM) will then add or subtract the fuel trim to obtain an ideal mixture. The Diagnostic Trouble Code (DTC) will set when the oxygen sensor voltage signal response time slower than the specified time.
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