Symptoms of a Bad or Failing Positive Crankcase Ventilation (PCV) Valve

Our certified mechanics come to you · Backed by our 12-month, 12,000-mile warranty · Get a fair and transparent estimate upfront

GET A QUOTE Backed by 12-month, 12,000-mile guarantee
Red-stars EXCELLENT RATING ON

Cost of Replacing a Bad or Failing Positive Crankcase Ventilation (PCV) Valve

Common signs of a faulty PCV valve include excessive oil consumption, oil leaking, a blocked breather filter, and reduction in overall performance. Our certified technicians can come to you and diagnose the problem. You will receive a $30 credit towards any follow-up repairs that result from the diagnostic. Following are example prices for Positive Crankcase Ventilation (PCV) Valve Replacement. Click on the button below to get an upfront quote for your car.

Cars Estimate Parts Cost Labor Cost Savings Average Dealer Price
2007 Nissan Frontier $82 $11.68 $70.00 31% $119.18
2008 Volvo C70 $125 $54.58 $70.00 23% $162.08
2004 Volvo S60 $106 $36.38 $70.00 26% $143.88
2010 Infiniti M35 $80 $10.38 $70.00 31% $117.88
2007 Mercedes-Benz GL320 $282 $211.88 $70.00 11% $319.38
2012 Tesla S $110 $39.58 $70.00 25% $147.08
GET A QUOTE FOR YOUR CAR

How to Diagnose a Bad or Failing Positive Crankcase Ventilation (PCV) Valve?

PCV valve

The positive crankcase ventilation (PCV) valve works to evacuate gas from the crankcase of the engine. The PCV valve directs these gases back into the combustion chambers via the intake manifold. This plays a large role in engine efficiency, improving emissions and the overall operation of your vehicle. A bad PCV valve will affect the performance of your vehicle, so there are a few signs to watch out for before the valve completely fails:

1. Excessive oil consumption and leak

A bad PCV valve may have a leak, which will cause excessive oil consumption. In addition, you may also notice oil leaking through the seals and dripping on to the floor of your garage. This is because the pressure in the crankcase may increase when the PCV valve fails, so the oil is pushed out through the seals and gaskets since there's no other way for the pressure to be released. The leak will cause your vehicle to burn oil and leak oil beneath your vehicle. If you notice either of these, consult a professional mechanic to have your PCV valve replaced.

2. Contaminated filter

A filter called a breather element may become contaminated with hydrocarbons and oil once the PCV valve starts failing. This is due to the increased pressure building up in the crankcase, which pushes water vapor through the breather element. The water gets mixed with the gas, which causes the buildup and can increase fuel consumption in your vehicle. One way to check this part is to physically inspect the filter for buildup. Another way is to measure the gas mileage on your vehicle. If it starts to go down seemingly without reason, the PCV valve may be going bad.

3. Overall poor performance

As the PCV valve starts going bad, the performance of your vehicle will get worse. This can be exhibited by a buildup of pressure in the exhaust or the engine could stall out. The bad PCV valve may not close all the way, so oxygen may get into the combustion chamber. When this happens, the fuel and air mixture is diluted causing your vehicle to run poorly and lean out.

If you notice your vehicle is leaking oil, consuming large amounts of oil, you have a contaminated filter, or the car is not working like it should, have the PCV valve looked at and replaced. This will keep your vehicle running smoothly and keep your fuel economy where it should be. YourMechanic makes getting repairs to your positive crankcase ventilation valve easy by coming to your location to diagnose or fix issues. YourMechanic’s experienced technicians are also available for any questions that may arise. You can book a service online 24/7.

PCV (Positive Crankcase Ventilation)
filters
crankcase
valves

Fast and easy Positive Crankcase Ventilation (PCV) Valve Replacement service at your home or office.

GET A QUOTE FOR YOUR CAR
Backed by 12-month, 12,000-mile guarantee

Recent Positive Crankcase Ventilation (PCV) Valve Replacement reviews

Excellent Rating


YourMechanic Positive Crankcase Ventilation (PCV) Valve Replacement Service

Average Rating

4.8/5

Number of Reviews

128

Rating Summary
117
5
1
0
5
117
5
1
0
5

Gerron

31 years of experience
86 reviews
Gerron
31 years of experience
Gerron was courteous, quick with his work, knowledgeable, and customer focused. I would recommend Gerron and will use his services in the future.
2002 MAZDA TRIBUTE - POSITIVE CRANKCASE VENTILATION (PCV) VALVE - VANCOUVER, WASHINGTON

John

24 years of experience
199 reviews
John
24 years of experience
John did a great job installing the starter and PCV Hose for me. He arrived early and got the job done quickly.
2002 FORD F-150 - POSITIVE CRANKCASE VENTILATION (PCV) VALVE - LEAGUE CITY, TEXAS

Dellano

15 years of experience
210 reviews
Dellano
15 years of experience
I had a few jobs that needed doing on the car: new plugs, pcv valve and air/fuel sensors. The price was amazing so I booked an appointment with Dellano. He showed up on time, got the job done and left. Simple! Dellano was professional and friendly and I'll definitely make another appointment when I need more work done.
2004 TOYOTA 4RUNNER - POSITIVE CRANKCASE VENTILATION (PCV) VALVE - ARLINGTON, VIRGINIA

Joe

40 years of experience
533 reviews
Joe
40 years of experience
Very professional and honest mechanic. He saved me a fortune by showing me how my local dealer was trying to cheat me. He came early and even went out of his way to buy a part for my vehicle. The dealer wanted to charge $2700 for the work, but he charged me around $400.
2011 DODGE DURANGO - POSITIVE CRANKCASE VENTILATION (PCV) VALVE - DOVER, FLORIDA

More related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0121 OBD-II Trouble Code: TPS "A" Circuit Range Performance Problem
P0121 code definition Throttle Pedal Position Sensor/Switch (TPS) A Circuit Range Performance Problem...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...

Related questions

Q: Oil leak on the hose which came form valve cover to air intake . Engine is new and recently worked on.

Hi there. By looking at the photos that you have provided is shows that the PCV (positive crankcase ventilation) valve is blowing by and causing engine oil to go through the PCV tube. Since your engine has a turbo on...

Q: Opinion on using the Lucas transmission additive as a prevention

For modern cars, a lot of them are pretty particular on what fluid they use. If you just add the fluid in the mix, it may not be compatible with the fluid that's in your transmission. If your transmission...

Q: I changed the crankcase vent tube, now the transmission won't shift

If the transmission was shifting fine prior to replacing these parts, then you need to start by double checking your work. Something may have been left loose or may not have been installed correctly. It is possible that the transmission...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1-800-701-6230 · hi@yourmechanic.com