Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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H32 - Check HO2S Heater Resistance



- Suspect sensor disconnected.

- Inspect sensor end of the connector for damaged or pushed out pins, moisture, contamination, etc. Service as necessary.

- Measure the resistance between VPWR circuit and Heater SIG. circuit at the HO2S connector.

- Is the resistance between 2.0 and 30.0 ohms?

YES -- Go to H33. H33 - Check For Short to GND In the HO2S Heater Harness Circuit

NO -- REPLACE HO2S. RECONNECT all components. Rerun quick test. Diagnostic Subroutines (DSR) - Extracting Codes