DSD Information System
Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (2GR-FKS) - Diagnostic Codes (2 Of 6) >> SFI System >> DTC P014C-00: O2 Sensor Slow Response - Rich to Lean Bank 1 Sensor 1; DTC P014D-00: O2 Sensor Slow Response - Lean to Rich Bank 1 Sensor 1; DTC P014E-00: O2 Sensor Slow Response - Rich to Lean Bank 2 Sensor 1; DTC P014F-00: O2 Sensor Slow Response - Lean to Rich Bank 2 Sensor 1; DTC P015A-00: O2 Sensor Delayed Response - Rich to Lean Bank 1 Sensor 1; DTC P015B-00: O2 Sensor Delayed Response - Lean to Rich Bank 1 Sensor 1; DTC P015C-00: O2 Sensor Delayed Response - Rich to Lean Bank 2 Sensor 1; DTC P015D-00: O2 Sensor Delayed Response - Lean to Rich Bank 2 Sensor 1 [12/2019 - 10/2022] >> Monitor Description

Monitor Description

After the engine has been warmed up, the ECM carries out air fuel ratio feedback control, and maintains the air fuel ratio at the theoretical level. In addition, after all the preconditions have been met, active air fuel ratio control is carried out for approximately 30 seconds and during active air fuel ratio control, the ECM measures the response of the air fuel ratio sensor by increasing or decreasing a specific injection quantity based on the theoretical air fuel ratio learned during normal air fuel control. The ECM determines whether there is an air fuel ratio sensor malfunction at the mid-point of active air fuel ratio control.

If the air fuel ratio sensor's response ability is reduced, DTC P014C-00, P014D-00, P014E-00 and P014F-00 are output.

If the air fuel ratio sensor output timing is delayed, DTC P015A-00, P015B-00, P015C-00 and P015D-00 are output.

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