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Home >> Toyota >> 2001 >> Sienna CE >> Repair and Diagnosis >> External Pages >> Different car >> Section 40 (Engine Controls - Self-Diagnostics) >> Diagnostic Tests >> DTC P0125: Insufficient Coolant Temperature For Closed Loop Fuel Control >> Diagnostic Aids

Diagnostic Aids

WARNING: This page is about a different car, the 2002 Lexus LX 470. However, it is still accessible from the selected car via links, so may be relevant.

After confirming DTC P0125, use scan tool to access CURRENT DATA to confirm voltage output of heated oxygen sensors (banks No. 1 and 2, sensor No. 1). If voltage displayed on scan tool is always less than 0.1 volt, circuit may be open or shorted. Using scan tool, read freeze frame data. Freeze frame records engine conditions when malfunction is detected.

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