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Home >> Acura >> 2021 >> TLX Base >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Mechanical And Engine Control System - Service, Testing And Troubleshooting (2 Of 2) >> General Information >> How to Set Readiness Codes (3.0L Engine) >> Air Fuel Ratio (A/F) Sensor Monitor and Readiness Code

Air Fuel Ratio (A/F) Sensor Monitor and Readiness Code

NOTE:
  • During the procedure, do not turn the vehicle to the ACCESSORY mode or the OFF (LOCK) mode.
  • All readiness codes are cleared when the 12 volt battery is disconnected, if DTCs have been cleared, or if the PCM is reset with the HDS.

Enable Criteria 

ECT SENSOR 1 at 140 deg.F (60 deg.C) or more.

Procedure 

1. Start the engine.

2. Test-drive the vehicle under stop-and-go conditions with short periods of steady cruise. During the drive, decelerate (with the throttle fully closed) for 5 seconds. After about 3.5 miles (5.6 km), the readiness code should switch from incomplete to complete.Check the readiness codes screen for the AIR FUEL RATIO (A/F) SENSOR in the DTCs MENU with the HDS.

4. Check for a Pending DTC. If there is no DTC, the enable criteria was probably not met. Select the DATA LIST Menu. Check ECT SENSOR 1 in the ALL DATA LIST with the HDS. If ECT SENSOR 1 is less than 140 deg.F (60 deg.C), run the engine until it is more than 140 deg.F (60 deg.C), then repeat the procedure.

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