HO2S Heater Monitor Readiness Code: Procedure
- Connect the scan tool to the vehicle's data link connector (DLC), and bring up the tool's generic OBD II mode.
- Start the engine, and let it idle for 1 minute. The readiness code should switch from incomplete to complete.
- If the readiness code is still set to incomplete, check for a temporary DTC. If there is no DTC, repeat the procedure.