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Home >> Lexus >> 2002 >> GS 300 >> 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 OBD-II scan tool, go to next step. If using Lexus scan tool, switch to CHECK mode. Ensure all accessories are off. Start and idle engine for 100 seconds or more. Drive vehicle at 24 MPH for 20 seconds or more. Repeat driving and idle part of test 3 more times. If malfunction exists, MIL will illuminate.

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