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Home >> Lexus >> 2002 >> IS 300 Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0125: Insufficient Coolant Temperature For Closed Loop Fuel Control >> Test Drive Confirmation

Test Drive Confirmation

Connect scan tool to Data Link Connector (DLC) No. 3. See Figure. If using Lexus scan tool, switch to CHECK mode. On both scan tools, start and warm engine to normal operating temperature. Allow engine to idle for 100 seconds or more. Drive vehicle at 24 MPH or more for 20 seconds. Stop vehicle and allow to idle for 20 seconds. Repeat driving and idle part of test 2 more times. At last idle test, allow to idle for 30 seconds. If using OBD-II scan tool, turn engine off. Repeat this procedure. If using either scan tool, if malfunction exists, MIL will illuminate.

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