HO2S Heater Circuit low (Bank 1 / Sensor 1)

Engine

Engine Control - P0031 HO2S Heater Circuit low (Bank 1 / Sensor 1) - Component Inspection

Component Inspection

1. Check HO2S (B1/S1) Heater resistance.
(1) IG "OFF" and disconnect HO2S (B1/S1) connector.
(2) Measure resistance between terminal 1 and 2 of HO2S (B1/S1)connector (Component Side)
Specification