Component Inspection

P0031 HO2S Heater Control Circuit Low (Bank 1 / Sensor 1)

Inspection/Repair - Component Inspection

Component Inspection

Check HO2S (B1/S1) Heater resistance
1. IG "OFF" and disconnect HO2S (B1/S1) connector
2. Measure resistance between power and control terminals of HO2S (B1/S1) heater (Component Side)

Specification : 3.3 - 4.1 [20 °C (68 °F)]




3. Is the measured resistance within specification?