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Home >> Mitsubishi >> 2003 >> Lancer Evolution >> Repair and Diagnosis >> External Pages >> Different car >> Section 18 (Engine Controls - Self-Diagnostics) >> Diagnostic Tests >> DTC P0125: Insufficient Coolant Temperature For Closed Loop Fuel Control >> Confirmation Driving Pattern
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Confirmation Driving Pattern

WARNING: This page is about a different car, the 2002 Lexus ES 300. However, it is still accessible from the selected car via links, so may be relevant.

Switch hand-held tester from normal mode to check mode. Start engine and let engine idle for 100 seconds or more. Drive vehicle at 24 mph or more for 20 seconds for more. Let engine idle for 20 seconds or more. Repeat procedure 3 times. Let engine idle for 30 seconds. Check oxygen sensor output voltage. If a malfunction exists, CHECK ENGINE warning light should come on.

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