PCV Valve Replacement Cost (2026): Valve, Hose, Oil Separator, by Car

Replacing a PCV valve costs $80–$220 at a US independent shop in 2026, parts and labor, and $100–$300 if a cracked hose or grommet is replaced in the same visit. What moves the price is where your engine hides the valve: a push-in valve on top of the engine is a 15-minute job, while one built into the valve cover, an oil separator or under the intake is hours. Below: prices by job and by car, what the NHTSA data shows, how to tell a bad valve from a vacuum leak, and when a quote near $1,000 is real.

What it costs

All figures: US independent shop, parts and labor, 2026. They are writer estimates pending review by our mechanic reviewer.

Labor runs roughly $90–$180 an hour across the US; shops on the coasts and dealer service departments sit at the top. If the shop has to find the leak first, a diagnostic hour is $100–$180 and a smoke test $100–$200.

Cost by car

The most specific NHTSA evidence for PCV trouble is in the lean codes. 159 owner complaints filed with NHTSA mention P0171 (system too lean, bank 1) across 79 models, and 251 manufacturer technical service bulletins name it. 58 complaints mention P0174, the bank 2 version, and 117 bulletins name that code. A leaking PCV valve, hose or grommet is one of the common vacuum leaks behind both codes, but not the only one. The engine-category counts in the table are broad: they cover anything an owner filed under ENGINE, not PCV parts, and are there for context.

A complaint is an owner report, not a confirmed defect, and one complaint can list several components. The Windstar stands out because both lean codes point at it. Turbo engines such as the Cruze and Sonic 1.4 sit higher because the PCV system on many of them lives inside the valve cover, so a failed valve means a new cover. With 251 bulletins naming P0171, ask the shop to check for one under your VIN before paying for parts.

Signs you need it

• Rough or high idle, sometimes a stall at stops. A stuck-open valve or split hose is a vacuum leak. See rough idle.
• Check engine light with P0171 or P0174. The engine is getting unmetered air. Both codes have other causes (MAF sensor, intake gasket, fuel pressure), so the PCV is a suspect, not a verdict.
• Whistle, hiss or squeal from the top of the engine at idle. Air rushing through a cracked grommet or a torn separator diaphragm.
• Oil consumption or blue smoke. A stuck-open valve can pull oil mist into the intake. More in car burning oil.
• New oil leaks, oil in the air box, or sludge under the cap. A stuck-closed valve lets pressure build in the crankcase and pushes oil past gaskets; see car leaking oil.
• Oil filler cap hard to pull off at idle, or pushing up by itself. Too much vacuum or too much pressure in the crankcase, both PCV clues.

Can you wait?

Yes, for a few weeks, if the only sign is a steady check engine light with a lean code and the car idles and drives normally. Keep an eye on the oil level.

Short trips only if the idle is rough, the car stalls at stops, or it is using a quart of oil every few hundred miles. Stalling in traffic is the real risk, and low oil costs far more than the valve.

No, get it fixed now if the check engine light is flashing, oil is being pushed out of the dipstick tube or a seal, or you smell burning oil under the hood. Pressure blowing a seal turns this into a much bigger job; see check engine light flashing.

What drives the price

Where the valve lives. On many older cars and pickups it is a push-in valve in a rubber grommet on the valve cover, a $10–$40 part and minutes of labor. On some V6 engines the valve sits under the intake plenum, and the plenum and its gaskets have to come off.

Built-in designs. Many newer engines, especially small turbo four-cylinders and European engines, have no separate valve. The PCV check valve and baffles are part of the plastic valve cover or a separate oil separator. You buy the whole assembly, and labor includes a new gasket. Our valve cover gasket replacement cost page covers that job in more detail.

Parts quality. Factory valves and separators cost more than aftermarket ones, but on built-in designs a cheap cover can warp or leak. On the plain push-in valve, brand matters less.

What gets replaced with it. Hardened hoses and grommets crack when the valve is pulled, so a shop often replaces them together. An oil change is sensible if the oil is sludgy.

The thing that makes it expensive. Letting a stuck-closed valve go. Crankcase pressure pushes oil past the valve cover gasket, cam and crank seals, and the fix becomes an oil leak repair instead of a $100 part.

Why the law cares

The PCV system exists so crankcase gases (blow-by past the piston rings, full of unburned fuel and oil vapor) are burned in the engine instead of vented into the air. Federal rules for new cars state that vehicles “may not discharge crankcase emissions into the ambient atmosphere” (40 CFR 86.1810-17(d)). That makes the PCV system an emissions part: a disconnected hose or a missing valve can set a code and fail a state inspection, and a “delete” is not a legal fix.

DIY or shop?

Easy at home on many engines. If the valve sits in a grommet on top of the valve cover, pull it out, check the hose, push in a new valve and clamp the hose back. A shaken valve that does not rattle is stuck. Parts only: $10–$40, plus $15–$80 for a hose or grommet.

Better left to a shop when the valve is under the intake plenum, built into the valve cover, or part of an oil separator behind the engine. Those jobs mean gaskets, torque specs on plastic parts, and sometimes a fuel or coolant line in the way. DIY parts cost there is $60–$350.

What goes wrong: brittle plastic elbows snap on removal, a grommet not fully seated leaks and keeps the lean code alive, and the wrong valve for the engine changes idle quality. Clear the code afterward and watch whether it returns.

How to not overpay

• Ask where the valve is on your engine. If the answer is “on top, in a grommet,” a quote over $150 needs an explanation.
• Get the leak confirmed. For a P0171 or P0174, ask for a smoke test or a check of fuel trims before parts are ordered; the PCV is one of several causes.
• Ask about bulletins. Hundreds of bulletins name the lean codes; one may cover your engine with a revised part or software.
• Get it in writing. Part number, OEM or aftermarket, and whether the hose, grommet or gasket is included.
• Second quote on built-in designs. Valve cover and oil separator jobs vary widely between shops. Not sure a quote makes sense? Paste it into the AI mechanic chat with your car and code.