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P1646

Hydraulic Cooling Fan Control Circuit Low; Linear 02 Sensor Control Chip (Bank 1)

P1646 is described as “Hydraulic Cooling Fan Control Circuit Low; Linear 02 Sensor Control Chip (Bank 1)” in the Chrysler reference. Other reference families are shown below; select the scope relevant to your vehicle.

Manufacturer reference family

Chrysler: P1646

en

Hydraulic Cooling Fan Control Circuit Low; Linear 02 Sensor Control Chip (Bank 1)

tr

Hidrolik Soğutma Fanı Kontrol Devresi Düşük; Doğrusal 02 Sensör Kontrol Çipi (Banka 1)

Reference namespace
chrysler
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: Chrysler.

5 profiles assigned this reference family
Manufacturer reference family

Ford: P1646

en

LINEAR O2 SENSOR CONTROL CHIP (Bank 1)

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

GM: P1646

en

Driver 1 Line 6; Evaporative Emission (EVAP) Vent Solenoid Control Circuit

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: P1646

en

MOTSTB Signal Malfunction

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: P1646

en

Booster Voltage - Too High; Linear 02 Sensor Control Chip (Bank 1)

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

Jaguar / Land Rover: P1646

en

Linear O2 Sensor Control Chip (Bank 1)

Reference namespace
jaguar-land-rover
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: Land Rover, Jaguar.

42 profiles assigned this reference family

18 more related profiles are listed in the vehicle directory.

Manufacturer reference family

Audi / Jetta / MAN / Seat / Skoda / Volkswagen: P1646

de

Evaporative Emission (EVAP) Vent Solenoid Control Circuit; Please Check DTC Memory of all wheel drive ECU

en

Evaporative Emission (EVAP) Vent Solenoid Control Circuit; Please Check DTC Memory of all wheel drive ECU

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.

Manufacturer reference family

Polestar / Volvo: P1646

en

Please Check DTC Memory of all wheel drive ECU

Reference namespace
volvo
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: Polestar, Volvo.

12 profiles assigned this reference family

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