Question

2007 Toyota Tundra 5.7L V8 with engine code P0052. Replaced OEM sensors from Toyota and light still keep coming on!

Answer 1

Check the connector for an damage and check the harness for a ground

- Air-Fuel Ratio (A/F) Sensor Bank 2 Sensor 1 harness is open shorted to ground
- Air-Fuel Ratio (A/F) Sensor Bank 2 Sensor 1 circuit poor electrical connection

Answer 2

P0052 TOYOTA Code - Air-Fuel Ratio Sensor Heater Control Circuit High 21
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