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P1643

Fuel Pump Monitor Circuit Low Input

P1643 is described as “Fuel Pump Monitor Circuit Low Input” in the Generic OBD2 reference. Other reference families are shown below; select the scope relevant to your vehicle.

Manufacturer reference family

Chrysler: P1643

en

Viscous Cabin Heater; CAN Link Engine Control Module / Transmission Control Module Circuit / Network; Fuel Pump Monitor Circuit Low Input

tr

Viskoz Kabin Isıtıcı; Motor Kontrol Modülü / Transmisyon Kontrol Modülü Devre / Şebekesine Bağlantı Verebilir; Yakıt Pompası Monitörü Devresi Düşük Girişi

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: P1643

en

Fuel Pump Monitor Circuit Low Input

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: P1643

en

Engine Speed Output Circuit; Starter motor relay - circuit malfunction

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: P1643

en

QBATT Battery Signal Circuit High Input

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: P1643

en

CAN Link Engine Control Module / Transmission Control Module Circuit / Network

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: P1643

en

CAN Link Engine Control Module/Transmission Control Module Circuit/Network

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

Lincoln: P1643

en

Fuel Pump Monitor Circuit Low Input

Reference namespace
lincoln
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

Mercedes-Benz: P1643

en

ECU incorrectly coded - or - CAN from transmission

Reference namespace
mercedes-benz
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: Mercedes-Benz.

13 profiles assigned this reference family
Manufacturer reference family

Mercury: P1643

en

Fuel Pump Monitor Circuit Low Input

Reference namespace
mercury
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

Dodge / Mitsubishi: P1643

en

Fuel Pump Monitor Circuit Low Input

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: P1643

en

Fuel Pump Monitor Circuit Low Input

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: P1643

en

Fuel Pump Monitor Circuit Low Input

Reference namespace
obd2
Source revision
legacy-2.2.20

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

Manufacturer reference family

Oldsmobile: P1643

en

Fuel Pump Monitor Circuit Low Input

Reference namespace
oldsmobile
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

Belgee / Geely / Proton: P1643

en

Fuel Pump Monitor Circuit Low Input

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

Dacia / Renault: P1643

ru

Низкий входной сигнал цепи реле 2 дополнительного обогревателя C-034; Неисправность цепи реле 3 дополнительного электрического обогревателя B-031; Неисправность цепи реле 3 дополнительного электрического обогревателя B-030

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.

Manufacturer reference family

Chevrolet / Citroen / General Motors / Opel / Peugeot: P1643

en

Fuel pump monitor circuit Low input

Reference namespace
stellantis-psa
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: Chevrolet, Opel, Citroen, General Motors, Peugeot.

35 profiles assigned this reference family

11 more related profiles are listed in the vehicle directory.

Manufacturer reference family

Audi / Jetta / MAN / Seat / Skoda / Volkswagen: P1643

de

Engine Speed Output Circuit; Please check DTC Memory of central electric ECU

en

Engine Speed Output Circuit; Please check DTC Memory of central electric 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: P1643

en

Please check DTC Memory of central electric 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