OBD LensFord: P1491
Secondary Switch Solenoid Circuit Malfunction
- 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
- 3.0L & 3.2L DieselFord
- Bronco 2021-Ford · 2021–onward
- EcoSport 1.6 Ztec 2009-Ford · 2009–onward
- Everest Gen.3 U704/UB (2022-n.d.) 3.0 Diesel + 10ATFord · 2022–onward
- Explorer 3.5 TiVCTFord
- Explorer Gen.6 3.0L (2020-n.d.)Ford · 2020–onward
- F150 VCTFord
- Falcon 4.0Ford · 2011–2014
- Focus II ST 2.5Ford
- Ford PHEV plug-in hybridFord
- Fusion 2.0 ecoboostFord
- Maverick 2022-n.d. 2.5 HybridFord · 2022–onward
- Mondeo Hybrid / Fusion HybridFord
- Mustang 2.3 EcoBoost (2015-2018)Ford · 2015–2018
- Mustang 2011 5.0 V8Ford · 2011–2011
- Mustang 2011-2017 3.7 V6Ford · 2011–2017
- Mustang GT 2016 5.0Ford · 2016–2016
- Mustang Mach-E (2023-)Ford · 2023–onward
- Mustang Mach-E / F-150 Lightning / E-TransitFord
- OBD-II / EOBD + CAN and extra PIDsFord
- OBDII/EOBD + SAE J1850 (Old Ford vehicles and trucks)Ford · 2004–2004
- Powerstroke 6.0L CANFord
- Powerstroke 6.4L CANFord
- Powerstroke 6.7L CANFord
4 more related profiles are listed in the vehicle directory.
Acura / Honda: P1491
Exhaust Gas Recirculation (EGR) Valve Insufficient Lift; Exhaust Gas Recirculation (EGR) Valve Insufficient Lift (EGR)
- 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
- Accord, Civic, CRV, CX-7 etc. 2008-2012 (var.1)Honda · 2008–2012
- Accord, Civic, CRV, CX-7 etc. 2008-2012 (var.2)Honda · 2008–2012
- Clarity PHEV, e:NY1Honda
- CR-V RE6, Accord DieselHonda
- EHonda
- Fit GK3Honda
- Honda/Acura HybridsAcura
- Insight II (2010-2014)Honda · 2010–2014
- OBD-II / EOBD + AT/CVT (CAN)Acura
- OBDII / EOBD GM based Ultium EV vehicles (2021-2025)Acura · 2021–2025
- OBDII / EOBD GM based Ultium EV vehicles (2026-n.d.)Acura · 2026–onward
- WWH-OBD (CAN 29 bit)Honda · 2026–2026
Mazda: P1491
Secondary Switch Solenoid Circuit
- Reference namespace
- mazda
- 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: Mazda.
7 profiles assigned this reference family
- 3 / 6 (GH1, GH2) / Miata (NC 2006-2015) / CX-7Mazda · 2006–2015
- BT50 UP, UR 2011-2020 (CAN)Mazda · 2011–2020
- MX-30Mazda
- MX-30 (not for use!)Mazda
- OBD-II (AT)Mazda
- SKYACTIVMazda
- WWH-OBD + CAN and extra PIDs (2026->)Mazda · 2026–onward
Mercedes-Benz: P1491
A/C refrigerant pressure too high
- 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
- E250 BlueTEC Diesel 2014-Mercedes-Benz · 2014–onward
- E350 DieselMercedes-Benz
- EQA / EQB / G-Class G580 EQMercedes-Benz
- EQC / EQVMercedes-Benz
- GLK 220 CDIMercedes-Benz
- GLK 350 3.5L, ML 350 GasolineMercedes-Benz
- OBD-II / EOBD + AT (CAN)Mercedes-Benz
- Sprinter 2011- 3.0 DieselMercedes-Benz · 2011–2011
- Sprinter II (2006-), NCV3Mercedes-Benz · 2006–onward
- W164 ML300 CDI 3LMercedes-Benz
- W168Mercedes-Benz
- W203 CDIMercedes-Benz
- W204 DieselMercedes-Benz
Dodge / Mitsubishi: P1491
Secondary Switch Solenoid Circuit Malfunction
- 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
- ASX 2.2 ATMitsubishi
- Colt 1.3/1.5Mitsubishi
- Eclipse Cross 1.5T/2.0/2.4 + CVTMitsubishi
- Eclipse Cross 2.2 Diesel / Delica D5 (2019-) + 8ATMitsubishi · 2019–onward
- Eclipse Cross PHEVMitsubishi
- Galant 9 AT CANMitsubishi
- i-MiEVMitsubishi
- L200 / Triton Gen.6 (LC/MV) (2023-n.d.) 4N16Mitsubishi · 2023–onward
- L200 2.5 DI-DMitsubishi
- Lancer VIII 1.5/1.6 ATMitsubishi
- Lancer VIII 2.0/2.4 CVTMitsubishi
- Lancer VIII 2.0/2.4 SSTMitsubishi
- Mirage (2012-), Space Star, Dodge Attitude 1.2Dodge · 2012–onward
- OBD-II / EOBD + MUT-2 (K-LINE) (-2005)Mitsubishi · 2005–2005
- Outlander II 2.2 DI-DMitsubishi
- Outlander II, III 2.3 DI-DMitsubishi
- Outlander II, XL, III (3.0+AT)Mitsubishi
- Outlander IV 1.5T 4B40 (2022-)Mitsubishi · 2022–onward
- Outlander IV 2.5 PR25DD (2021-)Mitsubishi · 2021–onward
- Outlander PHEVMitsubishi
- Pajero IV 3.0, 3.8 V6 [EN]Mitsubishi
- Pajero IV 3.0, 3.8 V6 [RU]Mitsubishi
- Pajero IV 3.0, 3.8 V6 + AT V4A51 [EN]Mitsubishi
- Pajero IV 3.0, 3.8 V6 + AT V4A51 [RU]Mitsubishi
7 more related profiles are listed in the vehicle directory.
Infiniti / Nissan: P1491
Secondary Switch Solenoid Circuit Malfunction; VC Cut/V BypasS/V
- 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
- 370Z Z34 3.7 V6Nissan
- Almera G15 + ATNissan
- Altima 2013-Nissan · 2013–onward
- Altima L32 2.5Nissan
- Altima L32 3.5 V6Nissan
- Armada TA60 5.6 V8Nissan
- Frontier D40 2.5Nissan
- Frontier D40 4.0 V6Nissan
- Frontier D41 Gen.3 (2022-n.d.)Nissan · 2022–onward
- GT-R (R35)Nissan
- Juke 1.5dci K9K 636 [EN]Nissan
- Juke 1.5dci K9K 636 [RU]Nissan
- Juke 2014-Nissan · 2014–onward
- Juke F15 (2010-2018) 1.6 TURBO + CVTNissan · 2010–2018
- Kicks HP15 e-Power (Gen.1)Nissan
- Leaf ZE0/AZE0 (2010-2017)Nissan · 2010–2017
- Leaf ZE1 (2017-2025)Nissan · 2017–2025
- March/Micra K13 1.5Nissan
- March/Micra K13 1.6Nissan
- Maxima A35 3.5 V6Nissan
- Murano Z51 3.5 V6 + CVTNissan
- Murano Z52 2015-Nissan · 2015–onward
- Nissan Consult IIInfiniti · 2001–2008
- Nissan Consult II ABS ONLYInfiniti · 2001–2008
38 more related profiles are listed in the vehicle directory.
Generic OBD2: P1491
Secondary Switch Solenoid Circuit Malfunction
- Reference namespace
- obd2
- Source revision
- legacy-2.2.20
Generic OBD2 definition; confirm the protocol and vehicle-specific service information.
Plymouth: P1491
Radiator Fan Control Relay Circuit Open Or Shorted
- Reference namespace
- plymouth
- 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.
Belgee / Geely / Proton: P1491
Secondary Switch Solenoid Circuit Malfunction
- 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
Saab: P1491
EVAP Tank Pressure Sensor. Performance Problem and malfunctional fuel level sensor.
- Reference namespace
- saab
- 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.
Chevrolet / Citroen / General Motors / Opel / Peugeot: P1491
Secondary switch solenoid circuit malfunction
- 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
- OBD-II / EOBDCitroen
- 1.5 BlueHDI ECU MD1CS003Citroen
- 307 (2001-2005)Peugeot · 2001–2005
- 308 (T9) + 6AT (CAN)Peugeot
- 308 (T9) + 8AT (CAN)Peugeot
- 308 + 4AT (CAN)Peugeot
- 308, 508, etc. with 1.6 BOSCH MED 17.4.2Peugeot
- A14NETChevrolet
- A20DTHChevrolet
- AISIN8Citroen
- AL4 K-Line/KWPCitroen
- Astra G Y17DT (1998-2004)Opel · 1998–2004
- B16DTHChevrolet
- B20DTHChevrolet
- Bolt / Ampera-EChevrolet
- Bolt / Ampera-E 2017-2020Chevrolet · 2017–2020
- Bosch MEDV 17.4.4 ECU (EP6FDTX)Citroen
- C4 B7 (2010-)Citroen · 2010–onward
- C4 with 1.6 BOSCH MED 17.4.2Citroen
- Combo C 1.3 CDTiChevrolet · 2001–2011
- ECU EDC16C3 KWPCitroen
- ECU EDC17C10_BR2Citroen
- ECU EDC17C60Citroen
- ECU MD1CS003Citroen
11 more related profiles are listed in the vehicle directory.
Subaru: P1491
POSITIVE CRANKCASE VENTILATION (BLOW-BY) FUNCTION PROBLEM
- Reference namespace
- subaru
- 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: Subaru.
5 profiles assigned this reference family
- 2010 - n.d. (CVT/AT + CAN)Subaru · 2010–onward
- 2022 - n.d. (CVT/AT + CAN)Subaru · 2022–onward
- BRZ (gen.1 2012-2021)Subaru · 2012–2021
- SSM2 over CAN (2008-2010)Subaru · 2008–2010
- WWH-OBD (CAN 11 bit) (2026-n.d.)Subaru · 2026–onward
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 recordingOBD 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