Component Inspection

P0038 HO2S Heater Circuit High (Sensor 2)

Inspection/Repair - Component Inspection

Component Inspection

1. Check resistance (S2)
(1) IG "OFF".
(2) Disconnect HO2S (S2) connector.
(3) Measure resistance between terminal 3 and 4 of HO2S (S2) (Component Side)
A. Specification :









(4) Is the measured resistance within specification?
YES
1) Substitute with a known - good ECM and check for proper operation.
If the problem is corrected, replace ECM and go to "Verification of Vehicle Repair" procedure.

CAUTION:
There is a memory reset function on scantool that can erase optional parts automatically detected and memorized by PCM.
Before or after testing PCM on the vehicle, use this function to reuse the PCM on the others

NO
1) Substitute with a known - good HO2S (S2) and check for proper operation.
If the problem is corrected, replace HO2S (S2) and go to "Verification of Vehicle Repair" procedure.