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Home >> Toyota >> 2020 >> Yaris L, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Diagnostic Codes (12 Of 13) >> SFI System >> DTC P2251-00: O2 Sensor Negative Current Control Circuit/Open - Bank 1, Sensor 1 [08/2018 - ] >> Confirmation Driving Pattern
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Confirmation Driving Pattern

Repeatability Verification Procedure (200 Pin Type) 

  1. Warm up the engine to allow the engine coolant temperature to reach 80 °C {176 °F} or more.
  2. Start the engine and leave it idling for 1 min.

    HINT: 

    • Match the engine coolant temperature in the recorded FREEZE FRAME DATA (Mode 02)/snapshot data, the vehicle speed, and engine speed values to the best extent possible while driving the vehicle.
  3. Try to reproduce the malfunction by driving the vehicle for 5 min based on the values in the FREEZE FRAME DATA (Mode 02)/snapshot data.

Repeatability Verification Procedure (186 Pin Type) 

  1. Warm up the engine to allow the engine coolant temperature to reach 80 °C {176 °F} or more.
  2. Start the engine and leave it idling for 1 min.

    HINT: 

    • Match the engine coolant temperature in the recorded FREEZE FRAME DATA/snapshot data, the vehicle speed, and engine speed values to the best extent possible while driving the vehicle.
  3. Try to reproduce the malfunction by driving the vehicle for 5 min based on the values in the FREEZE FRAME DATA/snapshot data.
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