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Diagnostic knowledge / P2A00 — Heated oxygen sensor (HO2S) 1, bank 1 - circuit range/performance
P2A00

Heated oxygen sensor (HO2S) 1, bank 1 - circuit range/performance

P2A00 is described as “Heated oxygen sensor (HO2S) 1, bank 1 - circuit range/performance” in the Generic OBD2 reference. Other reference families are shown below; select the scope relevant to your vehicle.

Manufacturer reference family

GM: P2A00

en

HO2S Circuit Closed Loop Performance Bank 1 Sensor 1 Low Temperature; HO2S Circuit Closed Loop Performance Bank 1 Sensor 1 High Temperature

Reference namespace
gm
Source revision
legacy-oem-dtc-r2-20260924

Reference family assigned by the production catalog. An entry in this family is not proof of a fault or ECU support on every listed vehicle.

Manufacturer reference family

Acura / Honda: P2A00

en

Air/Fuel Ratio (A/F) Sensor (Sensor 1) Range/Performance Problem

Reference namespace
honda
Source revision
legacy-oem-dtc-r2-20260924

Reference family assigned by the production catalog. An entry in this family is not proof of a fault or ECU support on every listed vehicle.

Related catalog brands: Honda, Acura.

12 profiles assigned this reference family
Generic OBD2

Generic OBD2: P2A00

en

Heated oxygen sensor (HO2S) 1, bank 1 - circuit range/performance

Reference namespace
obd2
Source revision
legacy-2.2.20

Generic OBD2 definition; confirm the protocol and vehicle-specific service information.

Manufacturer reference family

Dacia / Renault: P2A00

ru

Неисправность цепи датчика О2 (Блок 1, датчик 1) B-039

Reference namespace
renault
Source revision
legacy-oem-dtc-r2-20260924

Reference family assigned by the production catalog. An entry in this family is not proof of a fault or ECU support on every listed vehicle.

Related catalog brands: Dacia, Renault.

170 profiles assigned this reference family

146 more related profiles are listed in the vehicle directory.

What should I check before using this definition?

Keep the full code, module, status and freeze-frame data. Confirm the vehicle’s make, model, year and current manufacturer service information before choosing a repair. This entry does not identify a failed part by itself.

Organize a scan report or recording
Source and applicability

OBD Lens production library legacy-owner-2026-10-09-v81. This is a scoped technical reference, not a scan of your car. A catalog relationship does not certify that every ECU, year or engine returns the same signal or code definition.

Read the reference method

OBD Lens reference library · catalog legacy-owner-2026-10-09-v81. Sources and scope