HO2S Heater Inspection

WARNING: This page is about a different variant/trim than selected.

Disconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZI 3.7 V6] .)
Disconnect the HO2S connector.
Measure the resistance between HO2S terminals C and A.

Fig 1: Identifying HO2S Connector Terminals
- If it is not within the specification, replace the HO2S. (See HEATED OXYGEN SENSOR (HO2S) REMOVAL/INSTALLATION .)
  HO2S heater resistance
- 2-50 ohms