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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Control System (2GR-FKS) - Diagnostic Codes (1 Of 6) >> SFI System >> DTC P0030-12: HO2S Heater Control Bank 1 Sensor 1 Circuit Short to Battery; DTC P0030-13: HO2S Heater Control Bank 1 Sensor 1 Circuit Open; DTC P0050-12: HO2S Heater Control Bank 2 Sensor 1 Circuit Short to Battery; DTC P0050-13: HO2S Heater Control Bank 2 Sensor 1 Circuit Open; DTC P101A-9E: A/F Sensor Heater Performance Bank 1 Sensor 1 Stuck On; DTC P103A-9E: A/F Sensor Heater Performance Bank 2 Sensor 1 Stuck On [12/2019 - 10/2022] >> Typical Malfunction Thresholds

Typical Malfunction Thresholds

P0031 AND P0051

Heater on current Less than 0.8 A
P0032 AND P0052

Both of the following conditions are met -
Command to heater output On
Heater current detected by heater monitor IC 14 A or higher
P101D AND P103D

Both of the following conditions are met -
Heater current detected by heater monitor IC 14 A or higher
Heater off current Higher than 11 A
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