P2AC3 — Intake Air O2 Sensor Reference Voltage…

What this code means

Diagnostic trouble code P2AC3 indicates: Intake Air O2 Sensor Reference Voltage Circuit/Open Bank 2. It was set by your vehicle's onboard diagnostics system and will typically keep the check engine light on until it's addressed.

ECUs that can switch off P2AC3

P2AC3 is part of the Lambda / O2 OFF group. These ECUs support Lambda / O2 OFF, which switches it off:

DODGE / JEEP / CHRYSLER

Continental GPEC2A Continental GPEC3 Continental GPEC2 Continental GPEC5 Continental GPEC4 Continental GPEC4LM

GM GROUP (BUICK CADILLAC CHEVROLET OPEL)

DELCO E38 DELCO E92 DELCO E78 DELCO E88 DELCO E84 DELCO E37 DELCO E90

KIA / HYUNDAI

Delphi DCM6.2AP Kefico CPEGP 3.XX.X Kefico CPEGD 3.XX.X Kefico CPGPSH 3.XX.X Delphi DCM7.1AP

NISSAN / INFINITI

Hitachi SH7055 Hitachi SH7058 Hitachi SH72531 Hitachi SH7059 Hitachi SH72533 Hitachi SH72544 Hitachi RH850

TATA

Delphi DCM7.1AP

TOYOTA / LEXUS | PETROL

DENSO GEN1 DENSO GEN2 DENSO GEN3 DENSO GEN4 DENSO GEN3 GR86

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