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I had the PCV valve replaced, but the check engine light is still on, and I get the same code from CarMD. Also, I still get some hesitation while accelerating. I assume there are more parts related to the PCV that may need to be replaced, but I'm not sure how to do it. Any advice? Thanks! Brent

Answers from the Automotive Experts

Amy Mattinat, Owner and Author at Auto Craftsmen Ltd Dear Brent, PCV valves don*t usually turn on the check engine light. I highly recommend you take your vehicle to a trained mechanic who can properly diagnose your problem instead of wasting your money by replacing parts you may not need. All My Best, Amy Mattinat

Lori Johnson, Owner and Instructor at Ladies Start Your Engines Dear Brent, Even though a scan tool can indicate a component that is malfunctioning, it doesn't necessarily mean that it's bad. Many times there is something else wrong that's making the component give a bad reading. If you can get your hands on the service manual for your vehicle it will give you a step by step procedure to follow regarding the code your getting. This will have you do tests on components that may affect the PCV along with testing the PCV as well. It's also important to clear the codes using the scan tool and see if the code comes back. If it does, you need to do some more testing. You can order a service manual from a dealership or I'm sure you can get one on-line. I would make sure it's from the manufacturer though, since they will have the most accurate testing procedures. Good luck. Lori Johnson

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