What is the purpose of the Positive Crankcase Ventilation (PCV) system and PCV Valve on Ford Expedition?

The Positive Crankcase Ventilation (PCV) system reduces hydrocarbon emissions by circulating fresh air from the air cleaner, mixing with blow-by gases, and rerouting through a PCV valve. The PCV system consists of a PCV valve, a fresh air-filtered inlet, and vacuum hoses, and the PCV valve is meant to restrict flow to maintain idle quality. On 2005 and later Expedition/Navigator models, an electric heating element is added to the PCV system.

How to check the PCV Valve on Ford Expedition?

To sustain the efficient operation of a PCV system, it must be kept clean and its hoses checked according to the maintenance schedule. First, start the engine then disconnect the PCV valve from the intake manifold and check for vacuum. You will feel a vacuum if it is working properly. If there isn't any vacuum remove the hose to see if there is one inside it. Replace the valve if the hose has suction but not the valve itself. Find out whether a hose is blocked or broken by checking for suction at its ends. Inspect the grommet for damage and replace it as necessary. Clean and inspect the hose ensuring a snug fit. Install a new PVC valve as may be necessary.

Genuine Ford Expedition PCV Valve

Position Crank Ventilation Valve

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8 PCV Valves found

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Ford Expedition Valve Assembly
Part Number: AA5Z-6A666-D
$6.82 MSRP: $12.02
You Save: $5.20 (44%)
ADD TO CART
Product Specifications
- Other Name: Valve Assy
- Replaced by: KR3Z-6A666-A
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2015-2019 Ford Expedition | 6 Cyl 3.5L GTDI | 10-Speed Automatic Transmission (10R80), 4AT 4R75W, 4-Speed Automatic Transmission 4R70W (AODE), 4-Speed Automatic Transmission 4R75E Livonia, 4-Speed Automatic Transmission AODEW/4R75E W/TSS, 6-Speed Automatic Transmission (6R75), 6-Speed Automatic Transmission (6R80), Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Ford Expedition Valve Assembly
Part Number: 2L3Z-6A666-AA
$17.44 MSRP: $27.82
You Save: $10.38 (38%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Valve Assy; PCV Valve
- Replaces: 2L3Z-6A666-BA
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2003-2004 Ford Expedition | 8 Cyl 4.6L Romeo SOHC EFI | 4AT 4R75W, 4-Speed Automatic Transmission 4R70W (AODE), 4-Speed Automatic Transmission 4R75E Livonia, 4-Speed Automatic Transmission AODEW/4R75E W/TSS, 6-Speed Automatic Transmission (6R75), 6-Speed Automatic Transmission (6R80), Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Ford Expedition Valve Assembly
Part Number: YC3Z-6A666-CA
$29.64 MSRP: $47.27
You Save: $17.63 (38%)
ADD TO CART
Product Specifications
- Other Name: Valve Assy; PCV Valve
- Replaces: YC3Z-6A666-BB
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2003-2004 Ford Expedition | 8 Cyl 5.4L Modular SOHC | 4AT 4R75W, 4-Speed Automatic Transmission 4R70W (AODE), 4-Speed Automatic Transmission 4R75E Livonia, 4-Speed Automatic Transmission AODEW/4R75E W/TSS, 6-Speed Automatic Transmission (6R75), 6-Speed Automatic Transmission (6R80), Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Ford Expedition Kit - Crankcase Ventilation Valve
Part Number: YC2Z-6K773-AA
$41.04 MSRP: $60.00
You Save: $18.96 (32%)
ADD TO CART
Product Specifications
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2003-2004 Ford Expedition | 8 Cyl 5.4L Modular SOHC | 4AT 4R75W, 4-Speed Automatic Transmission 4R70W (AODE), 4-Speed Automatic Transmission 4R75E Livonia, 4-Speed Automatic Transmission AODEW/4R75E W/TSS, 6-Speed Automatic Transmission (6R75), 6-Speed Automatic Transmission (6R80), Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Ford Expedition Valve Assembly
Part Number: 1F1Z-6A666-AA
$12.29 MSRP: $19.09
You Save: $6.80 (36%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Other Name: Valve Assy; PCV Valve
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2002 Ford Expedition | 8 Cyl 4.6L | 4AT 4R100, 4AT 4R70W
View related parts
Ford Expedition VALVE ASY
Part Number: KR3Z-6A666-A
$6.82 MSRP: $12.02
You Save: $5.20 (44%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Other Name: PCV Valve
- Replaces: AA5Z-6A666-D, EV-290
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2015-2024 Ford Expedition | 6 Cyl 3.5 L FLEX, 6 Cyl 3.5 L GAS, 6 Cyl 3.5L GTDI | 10-Speed Automatic Transmission (10R80), 4-Speed Automatic Transmission 4R70W (AODE), 4-Speed Automatic Transmission 4R75E Livonia, 4-Speed Automatic Transmission AODEW/4R75E W/TSS, 4AT 4R75W, 6-Speed Automatic Transmission (6R75), 6-Speed Automatic Transmission (6R80), Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Ford Expedition Valve Assembly
Part Number: F75Z-6A666-BA
Product Specifications
- Other Name: Valve Assy; PCV Valve
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1997-2002 Ford Expedition | 8 Cyl 4.6L, 8 Cyl 5.4L | 4AT 4R100, 4AT 4R70W, 4AT E4OD
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Ford Expedition Valve Assembly - Regulating
Part Number: F7UZ-6A666-CA
Product Specifications
- Other Name: Valve Assy - Regulating; PCV Valve
- Manufacturer Note: EV-233 valve with 90 degree elbow
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1998 Ford Expedition | 8 Cyl 4.6L | 4AT 4R100, 4AT 4R70W, 4AT E4OD

Ford Expedition PCV Valve Parts Questions & Experts Answers

Valve Assembly - Regulating
F7UZ-6A666-CA
Q: What is the purpose of the Positive Crankcase Ventilation (PCV) system and PCV Valve on Ford Expedition?
A: The Positive Crankcase Ventilation (PCV) system reduces hydrocarbon emissions by circulating fresh air from the air cleaner, mixing with blow-by gases, and rerouting through a PCV valve. The PCV system consists of a PCV valve, a fresh air-filtered inlet, and vacuum hoses, and the PCV valve is meant to restrict flow to maintain idle quality. On 2005 and later Expedition/Navigator models, an electric heating element is added to the PCV system.
Valve Assembly
2L3Z-6A666-AA
Q: How to check the PCV Valve on Ford Expedition?
A: To sustain the efficient operation of a PCV system, it must be kept clean and its hoses checked according to the maintenance schedule. First, start the engine then disconnect the PCV valve from the intake manifold and check for vacuum. You will feel a vacuum if it is working properly. If there isn't any vacuum remove the hose to see if there is one inside it. Replace the valve if the hose has suction but not the valve itself. Find out whether a hose is blocked or broken by checking for suction at its ends. Inspect the grommet for damage and replace it as necessary. Clean and inspect the hose ensuring a snug fit. Install a new PVC valve as may be necessary.

Related Ford Expedition Parts

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2024 PCV Valve 2023 PCV Valve 2022 PCV Valve 2021 PCV Valve 2020 PCV Valve 2019 PCV Valve 2018 PCV Valve 2017 PCV Valve 2016 PCV Valve 2015 PCV Valve 2004 PCV Valve 2003 PCV Valve 2002 PCV Valve 2001 PCV Valve 2000 PCV Valve 1999 PCV Valve 1998 PCV Valve 1997 PCV Valve