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P0139

Heated oxygen sensor (HO2S) 2, bank 1 - slow response

P0139 is described as “Heated oxygen sensor (HO2S) 2, bank 1 - slow response” in the Generic OBD2 reference. Other reference families are shown below; select the scope relevant to your vehicle.

Manufacturer reference family

BMW: P0139

en

O2 Sensor Circuit Slow Response

Reference namespace
bmw
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: BMW.

10 profiles assigned this reference family
Manufacturer reference family

Continental Synerject Easy U: P0139

en

O2 Sensor Circuit Slow Response Bank 1 Sensor 2

Reference namespace
continental-synerject-easy-u
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

Ford: P0139

en

Heated O2 Sensor Circuit Slow Response (Bank 1, Sensor 2)

Reference namespace
ford
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: Ford.

28 profiles assigned this reference family

4 more related profiles are listed in the vehicle directory.

Manufacturer reference family

Acura / Honda: P0139

en

Secondary Heated Oxygen Sensor (Secondary HO2S) Slow Response

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
Manufacturer reference family

Genesis / Hyundai / Kia: P0139

ru

Цепь датчика кислорода (ряд 1/датчик 2), медленный отклик

Reference namespace
hyundai-kia
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: Kia, Genesis, Hyundai.

401 profiles assigned this reference family

377 more related profiles are listed in the vehicle directory.

Manufacturer reference family

Datsun / Lada: P0139

ru

Цепь датчика кислорода после нейтрализатора, медленный отклик на изменение состава смеси

Reference namespace
lada
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: Lada, Datsun.

23 profiles assigned this reference family
Manufacturer reference family

Dodge / Mitsubishi: P0139

en

O2 Sensor Circuit Slow Response (Bank 1 Sensor 2); Oxygen sensor(rear) response

Reference namespace
mitsubishi
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: Mitsubishi, Dodge.

31 profiles assigned this reference family

7 more related profiles are listed in the vehicle directory.

Manufacturer reference family

Infiniti / Nissan: P0139

en

O2 Sensor Circuit Slow Response (Bank 1 Sensor 2)

Reference namespace
nissan
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: Nissan, Infiniti.

62 profiles assigned this reference family

38 more related profiles are listed in the vehicle directory.

Generic OBD2

Generic OBD2: P0139

en

Heated oxygen sensor (HO2S) 2, bank 1 - slow response

ru

С опозданием отвечает цепь подогрева датчик кислорода (bank 1, датчик 2)

Reference namespace
obd2
Source revision
legacy-2.2.20

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

Manufacturer reference family

Belgee / Geely / Proton: P0139

en

O2 Sensor Circuit Slow Response (Bank 1 Sensor 2); Rear Oxygen Sensor Rich/Lean Switching Time

Reference namespace
proton
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: Belgee, Geely, Proton.

5 profiles assigned this reference family
Manufacturer reference family

GAC / Lexus / Toyota: P0139

en

Oxygen Sensor Bank 1 Sensor 2 Slow Response

Reference namespace
toyota
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: GAC, Toyota, Lexus.

24 profiles assigned this reference family
Manufacturer reference family

Audi / Jetta / MAN / Seat / Skoda / Volkswagen: P0139

de

HO2S Slow Response Bank 1 Sensor 2

en

HO2S Slow Response Bank 1 Sensor 2

Reference namespace
vag
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: Skoda, Volkswagen, Audi, Seat, MAN, Jetta.

56 profiles assigned this reference family

32 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