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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 P0036-12: HO2S Heater Control Circuit Bank 1 Sensor 2 Circuit Short to Battery; DTC P0036-14: HO2S Heater Control Circuit Bank 1 Sensor 2 Circuit Short to Ground or Open; DTC P0056-12: HO2S Heater Control Bank 2 Sensor 2 Circuit Short to Battery; DTC P0056-14: HO2S Heater Control Bank 2 Sensor 2 Circuit Short to Ground or Open; DTC P0141-18: O2 Sensor Heater Circuit Bank 1 Sensor 2 Circuit Current Below Threshold; DTC P0161-18: O2 Sensor Heater Circuit Bank 2 Sensor 2 Circuit Current Below Threshold; DTC P102A-9E: O2 Sensor Heater Performance Bank 1 Sensor 2 Stuck On; DTC P105A-9E: O2 Sensor Heater Performance Bank 2 Sensor 2 Stuck On [12/2019 - 10/2022] >> Typical Malfunction Thresholds

Typical Malfunction Thresholds

P0037 AND P0057: (CASE 1)

Heater on current - Learned heater off current 0.15 A or less
P0037 AND P0057: (CASE 2)

Heater on current 1 A or less
P0038 AND P0058

Both of the following conditions are met -
Heater current detected by heater monitor IC 4 A or higher
Command to heater output On
P0141 AND P0161

Heater resistance Varies with sensor element temperature (Example: Higher than 23 Ω)
P102D AND P0105D

Heater on current Higher than 1 A
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