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Home >> Lexus >> 1994 >> LS 400 V8-4.0L (1UZ-FE) >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Oxygen Sensor >> Testing and Inspection >> Sub Heated Oxygen Sensor
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Sub Heated Oxygen Sensor

INSPECTION

1. Verify Data Trouble code 27.
- Cancel Diagnostic Trouble Code 27.
- Allow the engine to warm up to normal operating temperature.
- Drive for 5 minutes or more between 80 km/h (50 mph) and 100 km/h (62 mph) in "D" positon.
- Following the conditions in the above step, press fully on the accelerator pedal for 2 seconds or more.

NOTE: Do not exceed 100 km/h (62 mph), or the Diagnostic Trouble Code will be cancelled.

- Stop the vehicle, and turn the Ignition Switch to OFF.
- Carry out the above steps again to test acceleration.
- If code No. 27 reappears again, check the Sub Heated Oxygen Sensor circuit. If the circuit is normal, replace the Sub Heated Oxygen Sensor.

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