DSD Information System
Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 52 (Engine Control System (A25A-FXS) - Diagnostic Codes (P0128-P0171)) >> 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 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 [10/2022 - 11/2023] >> Description

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 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 [10/2022 - 11/2023]: Description

WARNING: This page is about a different variant/trim than selected.

Refer to DTC P0030-12.

Refer to DESCRIPTION

HINT: 

Although the DTC titles say O2 sensor, these DTCs relate to the air fuel ratio sensor (sensor 1).

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
P014C-00 O2 Sensor Slow Response - Rich to Lean Bank 1 Sensor 1 The rich to lean response rate deterioration level* value is standard or less (2 trip detection logic).
  • Air fuel ratio sensor (sensor 1)
  • Air fuel ratio sensor (sensor 1) heater
  • ECM
Comes on DTC stored
  • SAE Code: P014C
  • DTC for Mexico Models: Does not apply
P014D-00 O2 Sensor Slow Response - Lean to Rich Bank 1 Sensor 1 The lean to rich response rate deterioration level* value is standard or more (2 trip detection logic).
  • Air fuel ratio sensor (sensor 1)
  • Air fuel ratio sensor (sensor 1) heater
  • ECM
Comes on DTC stored
  • SAE Code: P014D
  • DTC for Mexico Models: Does not apply
P015A-00 O2 Sensor Delayed Response - Rich to Lean Bank 1 Sensor 1 The rich to lean delay level* value is standard or more (2 trip detection logic).
  • Air fuel ratio sensor (sensor 1)
  • Air fuel ratio sensor (sensor 1) heater
  • ECM
Comes on DTC stored
  • SAE Code: P015A
  • DTC for Mexico Models: Does not apply
P015B-00 O2 Sensor Delayed Response - Lean to Rich Bank 1 Sensor 1 The lean to rich delay level* value is standard or more (2 trip detection logic).
  • Air fuel ratio sensor (sensor 1)
  • Air fuel ratio sensor (sensor 1) heater
  • ECM
Comes on DTC stored
  • SAE Code: P015B
  • DTC for Mexico Models: Does not apply

*: Calculated by ECM based on the air fuel ratio sensor (sensor 1) output.