How to remove and replace the PCV valve and hose in a Toyota Prius?

The PCV valve is threaded into the left (driver's) end of the valve cover, with the PCV system valve installed in the end of the valve cover. For 2004 and later models, it is necessary to remove several components to gain access to the PCV valve. Start by disconnecting the negative cable from the auxiliary (12-volt) battery. Then, remove the two mounting bolts from the interfering engine compartment relay block and unclip the wiring harness retainers. The air filter housing should be removed next. Disconnect the two interfering injector and coil wiring harnesses and set them aside. Remove the plastic cover from the wiring harness between the valve cover and the inverter/converter coolant reservoir. Disconnect the PCV valve hose and remove the PCV valve, then reattach the hose to the PCV valve and reconnect the wiring harnesses. With the engine idling at normal operating temperature, place your finger over the end of the valve. If there's no vacuum at the valve, check for a plugged hose or valve and replace any plugged or deteriorated hoses. Turn off the engine, remove the PCV valve from the hose, connect a clean piece of hose and blow through the valve from the valve cover (cylinder head) end. If air will not pass through the valve in this direction, replace it with a new one. When purchasing a replacement PCV valve, make sure it's for your particular vehicle and engine size and compare the old valve with the new one to ensure they're the same.

Genuine Toyota Prius PCV Valve

Position Crank Ventilation Valve

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7 PCV Valves found

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Toyota Prius Valve Sub-Assy, Ventilation
Part Number: 12204-21011
$12.13 MSRP: $16.95
You Save: $4.82 (29%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: PCV Valve
- Manufacturer Note: MARK 12204-21011
- Replaces: 12204-21010
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2001-2009 Toyota Prius | 4 Cyl 1.5L | 1NZFXE; 1NZFXE; NHW11L-AEEEBA, 1NZFXE; NHW20L-AHEEBA, NHW11L-AEEEBK, NHW20L-AHEEBA, NHW20L-AHEEBK
View related parts
Toyota Prius Valve Sub-Assy, Ventilation
Part Number: 12204-37010
$5.96 MSRP: $8.33
You Save: $2.37 (29%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: PCV Valve
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2010-2015 Toyota Prius | E, G, L, S | 4 Cyl 1.8L | 2ZRFXE; 2ZRFXE; ZVW30L-AHXBBA, ZVW30L-AHXEBA, ZVW30L-AHXEBK, ZVW30L-AHXGBA, ZVW35L-BHXBBA, ZVW35L-BHXEBA, ZVW35L-BHXEBK, ZVW35L-BHXGBA
View related parts
Toyota Prius Valve Sub-Assembly, Vent
Part Number: 12204-21012
$5.90 MSRP: $8.25
You Save: $2.35 (29%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Other Name: Valve Sub-Assy, Ventilation
- Manufacturer Note: MARK 12204-21012
- Replaced by: 12204-21013
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2008-2009 Toyota Prius | 4 Cyl 1.5L | 1NZFXE; 1NZFXE; NHW20L-AHEEBA, NHW20L-AHEEBK
View related parts
Toyota Prius Valve Sub-Assy, Ventilation
Part Number: 12204-21010
$12.13 MSRP: $16.95
You Save: $4.82 (29%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Manufacturer Note: MARK 12204-21010
- Replaced by: 12204-21011
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2001-2005 Toyota Prius | 4 Cyl 1.5L | 1NZFXE; 1NZFXE; NHW11L-AEEEBA, NHW11L-AEEEBK, NHW20L-AHEEBA, NHW20L-AHEEBK
View related parts
Toyota Prius Valve Sub-Assembly, Vent
Part Number: 12204-37050
$5.90 MSRP: $8.25
You Save: $2.35 (29%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Valve Sub-Assy, Ventilation; PCV Valve
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2016-2022 Toyota Prius | 4 Cyl 1.8L | 2ZRFXE; 2ZRFXE; ZVW50L-AHXEBA, ZVW51L-AHXBBA, ZVW51L-AHXEBA, ZVW51L-AHXGBA, ZVW51L-AHXHBA, ZVW55L-AHXEBA, ZVW55L-AHXGBA
View related parts
Toyota Prius Valve Sub-Assembly, Vent
Part Number: 12204-37060
$5.90 MSRP: $8.25
You Save: $2.35 (29%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Valve Sub-Assy, Ventilation
- Manufacturer Note: MEXICO SPEC
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2016-2020 Toyota Prius | 4 Cyl 1.8L | 2ZRFXE; 2ZRFXE; ZVW50L-AHXEBA, ZVW51L-AHXEBA
View related parts
Toyota Prius Valve Sub-Assembly, Vent
Part Number: 12204-37070
$5.88 MSRP: $8.22
You Save: $2.34 (29%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Manufacturer Note: MEXICO SPEC
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2019-2022 Toyota Prius | 4 Cyl 1.8L | 2ZRFXE; 2ZRFXE; ZVW51L-AHXEBA

Toyota Prius PCV Valve

The PCV Valve used in Toyota Prius cars is an essential device that contributes in regulation of emissions and improvement of the engine power. This common engine component that is known as the PCV Valve keeps the gases produced through combustion in the crankcase recirculated back into the combustion chambers of the engine, thus burning the gases without polluting the environment with dangerous gases. Located inside the intake manifold, the PCV Valve works under the intake manifold vacuum conditions: it restricts the gas intake at idle conditions and in turn opens at higher RPMs to provide adequate crankcase ventilation without affecting the running of the engine. Also, a PCV Valve is actually a flame arrester and it also helps to maintain the vehicle's proper ventilation as it prevents the positive pressure from moving to the crankcase. Later, when the PCV valve wore out, engine oil leaks and other complications arose, and it became apparent that proper maintenance of the PCV Valve should be done from time to time to avoid the mentioned problems.

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Toyota Prius PCV Valve Parts Questions & Experts Answers

Valve Sub-Assy, Ventilation
12204-21010
Q: How to remove and replace the PCV valve and hose in a Toyota Prius?
A: The PCV valve is threaded into the left (driver's) end of the valve cover, with the PCV system valve installed in the end of the valve cover. For 2004 and later models, it is necessary to remove several components to gain access to the PCV valve. Start by disconnecting the negative cable from the auxiliary (12-volt) battery. Then, remove the two mounting bolts from the interfering engine compartment relay block and unclip the wiring harness retainers. The air filter housing should be removed next. Disconnect the two interfering injector and coil wiring harnesses and set them aside. Remove the plastic cover from the wiring harness between the valve cover and the inverter/converter coolant reservoir. Disconnect the PCV valve hose and remove the PCV valve, then reattach the hose to the PCV valve and reconnect the wiring harnesses. With the engine idling at normal operating temperature, place your finger over the end of the valve. If there's no vacuum at the valve, check for a plugged hose or valve and replace any plugged or deteriorated hoses. Turn off the engine, remove the PCV valve from the hose, connect a clean piece of hose and blow through the valve from the valve cover (cylinder head) end. If air will not pass through the valve in this direction, replace it with a new one. When purchasing a replacement PCV valve, make sure it's for your particular vehicle and engine size and compare the old valve with the new one to ensure they're the same.