Component Inspection

Engine Control
P0037 HO2S Heater Circuit low (Bank 1 / Sensor 2) - Component Inspection

Component Inspection

1. Measure resistance between terminals 3 and 4 of the sensor connector (Component side)
Specification









2. Is resistance within the specification?
YES
> Check for poor connection between PCM and component: backed out terminal, improper mating, broken locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair" procedure.
NO
> Check HO2S for contamination, deterioration, or damage. Substitute with a known-good HO2S and check for proper operation. If the problem is corrected, replace HO2S and then go to "Verification of Vehicle Repair" procedure.