HomeEmission Control > Evaporative SystemStandard Ignition CP421 Vapor Canister Vent Solenoid
Part #: CP421

Standard Ignition CP421 Vapor Canister Vent Solenoid

42 vehicles fit this part
Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
Fitment: Honda and Acura, S2000, MDX, RL, Odyssey, Pilot, and CR-V
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Overview of Standard Ignition Vapor Canister Vent Solenoid CP421

The Standard Ignition Vapor Canister Vent Solenoid CP421 is designed for emission control systems in select Acura and Honda vehicles. This solenoid valve plays a critical role in managing fuel vapor flow, helping maintain proper emissions performance in models such as the Honda Accord, Civic, CR-V, and Acura MDX.

  • Connector Gender: Female
  • Connector Quantity: 1
  • Connector Shape: Rectangular
  • Contents: Valve
  • Terminal Gender: Male
  • Terminal Quantity: 2
  • Terminal Type: Blade

Detailed Product Description

The CP421 vapor canister vent solenoid from Standard Ignition is engineered to meet OEM specifications for emission control switches, solenoids, and actuators. Featuring a female rectangular connector and two male blade terminals, this valve ensures secure electrical connections and reliable operation. The solenoid controls the venting of fuel vapors from the charcoal canister to the atmosphere, which is essential for reducing evaporative emissions in vehicles like the Honda Odyssey, Pilot, and Acura TL. While the outer diameter requires physical measurement, the solenoid’s design supports straightforward integration with the vehicle’s existing emission system.

Compatible Vehicles and Applications

This vapor canister vent solenoid CP421 is compatible with a range of Acura and Honda models, including:

  • Acura CL, MDX, RL, S2000, TL
  • Honda Accord, Civic, CR-V, Odyssey, Pilot

It is specifically designed to replace factory solenoids in these vehicles, ensuring proper emission control system function.

Common Issues Addressed by This Solenoid

  • Check engine light triggered by evaporative emission system faults
  • Fuel vapor leaks causing increased emissions
  • Failed emissions tests related to vapor canister venting
  • Rough engine idle due to improper vapor flow
  • Fuel odor inside or around the vehicle

Installation Notes and Tips

Installation of the Standard Ignition CP421 vapor canister vent solenoid requires basic automotive electrical knowledge. Ensure the female rectangular connector aligns properly with the vehicle harness and that the two male blade terminals are securely connected. It is recommended to verify the part number and fitment against your vehicle’s VIN before installation. Physical measurement of the outer diameter may be necessary to confirm compatibility with the mounting location.

Quality Assurance and Warranty

Standard Ignition parts are manufactured to meet or exceed OEM standards for durability and performance. The CP421 vapor canister vent solenoid undergoes rigorous quality control to ensure reliable operation within emission control systems. Warranty coverage details should be confirmed at the point of purchase, as they may vary by distributor.

BrandStandard Ignition
Part NumberCP421
Connector GenderFemale
Connector ShapeRectangular
ContentsValve
Outer diameter (mm)Requires Physical Part
Terminal GenderMale
Terminal TypeBlade

This part fits 42 vehicles. Search below:

YearMakeModelSubmodelLitersCylindersPositionNotes
2005HondaS2000N/ABypass Valve
2004AcuraMDXN/ABypass Valve
2004AcuraRLN/ABypass Valve
2004HondaOdysseyN/ABypass Valve
2004HondaPilotN/ABypass Valve
2004HondaS2000N/ABypass Valve
2003AcuraCLN/A
2003AcuraMDXN/ABypass Valve
2003AcuraRLN/ABypass Valve
2003AcuraTLN/A
2003HondaOdysseyN/ABypass Valve
2003HondaPilotN/ABypass Valve
2003HondaS2000N/ABypass Valve
2002AcuraCLN/A
2002AcuraMDXN/ABypass Valve
2002AcuraRLN/ABypass Valve
2002AcuraTLN/A
2002HondaAccordN/A
2002HondaOdysseyN/ABypass Valve
2002HondaS2000N/ABypass Valve
2001AcuraCLN/A
2001AcuraMDXN/ABypass Valve
2001AcuraRLN/ABypass Valve
2001AcuraTLN/A
2001HondaAccordN/A
2001HondaCR-VN/Aw/o Hose
2001HondaOdysseyN/ABypass Valve
2001HondaS2000N/ABypass Valve
2000AcuraRLN/ABypass Valve
2000AcuraTLN/A
2000HondaAccordN/A
2000HondaCR-VN/A
2000HondaOdysseyN/ABypass Valve
2000HondaS2000N/ABypass Valve
1999AcuraCL2.3LL4N/A
1999AcuraTLN/A
1999HondaAccordN/A
1999HondaCR-VN/A
1999HondaOdysseyN/ABypass Valve
1998HondaAccordN/A
1998HondaCivicHXN/A
1998HondaCR-VN/A

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

17012S0XA01191461092-282312M10862VPR0009600359573-1422911-760CP510CPC1129PV452

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.