Can a faulty Pcv valve cause catalytic converter problem

Using excessive oil . It is not leaking. Car has no power to accelerate or climb Hills.

My car has 64000 miles.
My car has an automatic transmission.

Experienced mechanics share their insights in answering this question :
As you may know, a faulty or clogged PCV valve may cause the engine to consume oil due to a lack pressure relief. This may eventually cause problems with the catalytic converter as well due to the car’s inability to expel the exhaust gases properly. i would suggest having a professional from YourMechanic come to your location to diagnose and inspect your PCV valve problem.

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As you may know, a faulty or clogged PCV valve may cause the engine to consume oil due to a lack pressure relief. This may eventually cause problems with the catalytic converter as well due to the car`s inability to expel the exhaust gases properly.
Installation position of the PCV valve on the cylinder head. In vehicles with turbochargers, power loss, rough idling, or whistling noises are indicators of a defective crankcase ventilation system, MAHLE Aftermarket reports.
When your PCV valve is malfunctioning, it throws the air to fuel mixture out of balance and can lead to poor performance and rough idle, as well as misfires. In the very short term, these issues should not damage your car, but if you don`t fix the issue, you can do lasting damage, so it`s best to get it fixed promptly.
However, a bad PCV valve is a tiny, inexpensive part that can cause an engine to burn oil if it goes bad. Replacing it is fast and easy! If your engine is burning oil, hope that it`s due to a bad PCV valve.
PCV Valve Replacement

If the valve doesn`t open and close on schedule, or if any part of the system clogs, the result can be a rough idle, sluggish acceleration or increased oil consumption.

Driving with A Failed Catalytic Converter

If you`re noticing slow powertrain performance, reduced acceleration, a smell of rotten eggs or sulfur from the exhaust, dark exhaust smoke, or extreme heat from under the vehicle, these are symptoms of a clogged Catalytic Converter, and it should be replaced quickly.

Common signs of a faulty PCV valve include excessive oil consumption, oil leaking, a blocked breather filter, and reduction in overall performance.
Too much clearance means the valves will likely clatter and, over the long term, cause damage to the valves, camshaft lobes or rocker arms. If there`s too little valve clearance, the valves won`t fully close, causing excessive heat, and the engine will lose power.
Another symptom of a bad or failing PCV valve hose is your vehicle will misfire while it is idling. This can be from a loss of vacuum due to the hose not working properly because of a leak, the hose being pinched, or becoming clogged from buildup over time.
A PCV valve that`s stuck open will allow too much air to enter the intake manifold, leading to a leaner idling fuel-air mixture. Stuck closed leads to a build up of pressure in the crank case which creates a variety of oil leaks! And this in turn can lead to a range of issues, including a rough idle.
If your engine is low on oil but there isn`t a leak, that means it`s probably being burned inside the engine. A bad PCV valve is a frequent culprit in the case of burning oil–but what is it, exactly? A PCV valve is designed to let air escape when the pressure in the crankcase is too high.
A stuck closed PCV valve results in excessive crankcase pressure. It forces oil past the engine`s seals and gaskets. A stuck open PCV valve or leaking hose results in a large vacuum leak, a rough idle, and drivability issues like surging.
fuel consumption – Potential for failing PCV valve causing intermittant p0420 (catalyst efficiency below threshold) – Motor Vehicle Maintenance & Repair Stack Exchange.
The PCV system allows for cleaner exhaust, prevents blowby at seals and gaskets, removes crankcase gasses generated by the combustion process that will sludge up and destroy the engine if left unchecked, and allows the engine to run more efficiently thus creating better fuel mileage!
The problem is caused by unmetered air entering the engine through the PCV system. The P0420 trouble code will appear first before P1101 as the parameters are much more sensitive, do not replace the converter until a proper diagnosis has been performed.
Most catalytic converter failures fall under one of three categories: Overheated, melted or broken converters.
The most common reason for a catalytic converter to fail is because a related part fails — most often, a faulty spark plug. (Bad plugs can cause unburned gas to overheat inside the catalytic converter.)

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Please help me figure out where my PCV valve and PCV Hose is!!!
ANSWER : Hi there. The PCV valve is located on bank 1; the valve cover closest to the cabin. It is usually found under the intake plenum towards the passenger side of the vehicle. The hose will be attached; or loose. Please understand that a code retrieval and an internet search is not a proper diagnosis as there are several other possibilities that can cause the code to set. Some of the possible causes could be spark plugs, ignition coils, intake manifold leaks, intake plenum leaks, vacuum hose leaks, failing airflow meter, failing O2 sensors, exhaust manifold leaks, low fuel pressure, failing ECU, faulty wiring harness, failing injectors, etc… As you can see, the list of possibilities runs on and on. This is where the expertise and experience of a qualified technician with the proper diagnostic tools and procedures becomes invaluable. I strongly suggest having a qualified technician perform an inspection to avoid replacing unnecessary parts and determine the exact cause of the code. Your Mechanic has several available technicians that can assist you with a check engine light inspection.

I keep having acceleration problems, the mechanic keeps saying catalytic converter 2006 Pontiac Torrent
ANSWER : Hi there – I would look for a trusted 2nd opinion. Having multiple failures of the same type is both expensive, and an indication that the real source problem is not being discovered. Get the problem codes that are setting the Check Engine light. An auto parts store will do this for you for free on a "time-available" basis. A lean fuel mixture condition shouldn’t be "killing" catalytic converters at the rate you describe (but too rich will). A lean condition could be caused by an air leak in the intake, or malfunctioning oxygen sensors (pre-catalytic converter). I recommend a loss of power inspection performed by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, and give you an accurate assessment of damage and cost estimate for repairs.

Can a faulty Pcv valve cause catalytic converter problem
ANSWER : As you may know, a faulty or clogged PCV valve may cause the engine to consume oil due to a lack pressure relief. This may eventually cause problems with the catalytic converter as well due to the car’s inability to expel the exhaust gases properly. i would suggest having a professional from YourMechanic come to your location to diagnose and inspect your PCV valve problem.

Does traction control depend on catalytic converter functioning properly?
ANSWER : You are right, the traction control system is not related in any way to the exhaust system (e.g., the catalytic converter) in the vehicle. Traction control involves wheel speed sensors, the ABS system, and electronic controllers. If there is a problem with the traction control system on your vehicle, it is likely that diagnostic trouble codes have been stored and those codes will provide the key clues to finding, and repairing, the fault in the system. A certified Mechanic, dispatched by YourMechanic right to your location, can perform a traction control system diagnostic and let you know of the required repairs. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

Hi Mr. Nicholas: Engine light of my Accord Lx 2010 comes on. I want to be sure the problem is with the catalytic converter or O2 s
ANSWER : Hi there. In short, yes – it is highly probable that the check engine light is not 100% caused by the catalytic converter. Most OBD-II trouble codes related to this system are actually caused by O2 sensor failure, electrical harness failure to O2 and the catalytic converter or other emissions systems. On your Honda, there is one catalytic converter, that is comprised of a few individual sections. When it it replaced however, it is replaced as a single unit. In most cases, when a Honda dealership tells you that the catalytic converter is the source, 80% of the time they are correct. I would recommend reading this article and asking yourself if you are experiencing more than 50% of these are occurring.

Is the pcv supposed to fit loose on the valve cover? And how do you remove the pcv itself?
ANSWER : The PCV on this engine has a lock tab and unscrews from the valve cover. The tab may break when you try and remove it so make sure you have the correct one before you try and remove the old one. It will have what looks like threads on the bottom of the valve and will screw into the valve cover with a half turn and locks in place. To remove it, lift and turn counter clockwise and pull out. It will have an O-ring to seal it on the valve cover. If you end up needing some help with this, consider YourMechanic, as a certified technician can come to you and assist you with servicing your PCV valve.

Changed catalytic converter, no lights on dashboard, but codes for catalytic converter & O2 sensor still remain
ANSWER : Hi there, thanks for writing in. I am not sure why you changed your catalytic converter. Assuming you had a P0420 code, replacing the catalytic converter should of resolved that code. The codes originally stored need to be cleared. The fact your check engine light remains off tells me, you may have fixed the problem. Try disconnecting the negative battery terminal for at least 2 minutes, reconnect. Start and drive the vehicle for 10-15 miles. Re-check for codes. If a code returns on the first drive cycle (pending code), a problem still exists. The check engine light should come back on (the next drive cycle) if, the fault is recognized by the computer. An exhaust leak before the oxygen sensor will cause O2 sensor and catalytic converter codes. If you are having trouble identifying the fault, consider having an expert automotive technician from YourMechanic come to your home or office to inspect and diagnose this issue for you, and make or suggest any repairs as needed.

What would happen if the wrong catalytic converter was installed in my 2001 Toyota Camry
ANSWER : Hello. The wrong converter will cause your check engine light to come on and will cause you to not pass emissions. It can also cause some performance and efficiency issues over time. There are specific converters built for all vehicles and that is what needs to be used, especially in California. You need to take it back to the shop that installed the wrong one as it is against emission regulations to install the wrong converter in California.