Sunday, 6 September 2026

P0037 is an OBD-II trouble code that means HO2S Heater Control Circuit Low (Bank 1, Sensor 2). This code indicates that the engine control module (ECM/PCM) has detected a low voltage or abnormal condition in the oxygen sensor heater control circuit.

Related OBD-II Codes

If your scan tool shows a related oxygen sensor heater code, see:

P0038 – HO2S Heater Control Circuit High

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P0037 is an OBD-II trouble code that means HO2S Heater Control Circuit Low (Bank 1, Sensor 2) . This code indicates that the engine contro...