Mercedes-Benz ML350 PCV Valve Replacement Costs

Symptoms of failing PCV Valves

Poor engine performance

You can claim you got your car for practical reasons, but we all know you like to mash the gas pedal and have a little fun every chance you get. But with a busted PCV valve, you’ll have some engine issues, including stalling, a rough idle, and incorrect idle speeds.

Oil leaks

Leaks of any kind are never fun. If your car is leaking oil, it may be due to a busted PCV valve causing excess pressure in the crankcase.

Check engine light

Yeah, yeah, yeah big shot. You like to ignore the check engine light, we get it. Let me let you in on a little secret: what’s ailing your car won’t disappear just because of your blissful ignorance. The warning light will likely illuminate if your car is having a PCV valve issue, and, I repeat: it won’t just disappear.

Accumulation of sludge

Well, isn’t that just a glorious pairing of words? If your engine has a buildup of sludge, it’s quite possibly a failing PCV valve.

Oil in the air intake system

Chances are, you won’t notice if there’s oil in the air intake system. Don’t take that personally, you just don’t seem like the type of person to be tinkering with the air intake system in your spare time. But a mechanic might notice it, and if they do, they’ll probably want to check your PCV valve.