P3429 OBD-11 Trouble Code: Cylinder Exhaust Valve Control Circuit/Open

Schedule Brake Pad Replacement
Service Area

$124.62 - $450.29

Price range for all vehicles
Average rating from 10,770 customers who received a Brake Pads Replacement.

What the P2429 code means

This code indicates that there is a problem with the exhaust valve on cylinder number 4. Your vehicle’s control module detects that the measured values from the MAP sensor, MAF sensor, and TP sensor are not within the range of the calculated values for cylinder deactivation mode.

What causes the P2429 code?

There are a few potential causes for the P2429 code. One is a faulty Cylinder Deactivation Solenoid. Other issues might be that your Cylinder Deactivation Solenoid harness is shorted or open, or that your Cylinder Deactivation Solenoid circuit is suffering from a poor electrical connection.

What are the symptoms of the P2429 code?

You will probably notice that your engine light is on. If you see this, you need to investigate the problem.

How does a mechanic diagnose the P2429 code?

First, you should make sure that your engine oil pressure and levels are correct. You can use your OBD-II scanner to gather all the diagnostic trouble codes stored by the powertrain control module (PCM). Remember that if your PCM has stored other deactivation or oil pressure trouble codes, that you need to handle these first. Always work in the order that the codes appear. Next use your OBD-II to clear the trouble codes and then test the cylinder deactivation solenoid 1 by actuating it with a scan tool.

A solenoid that is in good shape will vibrate and make a tiny clicking noise. If the cylinder deactivation solenoid 1 is malfunctioning, be sure to check the oil passages for debris, and to clean the oil passages. You may also need to replace the solenoid. However, if the cylinder deactivation solenoid 1 is working well, then you will need to inspect the cylinder deactivation solenoid 7. You test this the same way: by actuating it with a scan tool. If your solenoids check out, you need to inspect the oil passages to the lifter. Clean the passages if you need to. In extreme cases, the engine block will need to be disassembled.

Common mistakes when diagnosing the P2429 code

A common mistake is to replace your wheel speed sensors, crankshaft position sensors, and camshaft. This will not necessarily solve the problem. This is why it is so important to use the proper diagnostic equipment, or to take your vehicle to a professional technician who will diagnose the problem for you.

How serious is a P2429

A P2429 is very serious and, in most instances, should be handled by a professional technician. Not only is a P2429 serious, but it is also difficult to fix, requiring that you have specialized diagnostic equipment. If you do not have this equipment your best bet may be to get to a professional technician and have him or her solve the issue for you.

What repairs can fix the P2429 code?

Depending on the specific issue, there are several repairs that can be done to fix a P2429. One is to replace your cylinder deactivation solenoid 1.

However, if this solenoid seems to be working fine, then you may need to replace your cylinder deactivation solenoid 7. You may need to clear your cylinder deactivation solenoid oil passages of debris and dirt, or clean out your lifter oil passages. In more extreme cases you will need to replace the lifters in your engine. In the worst case scenario, or if your engine is packed with debris and dirt, you will need to disassemble the entire engine and perform a thorough cleaning.

Additional comments for consideration regarding the P2429 code

A P2429 can become complicated and may require that you dissemble your vehicle’s engine, which is time consuming and complicated if you do not have the proper training. Therefore, it is important to do the proper amount of research before you begin to work. If you are thinking of doing this yourself, you might want to contact a professional technician to ask questions about the best way to solve your problem.

Need help with a P2429 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online at or speak to a service advisor at 1-800-701-6220.


Next Step

Schedule Brake Pad Replacement

The most popular service booked by readers of this article is Brake Pad Replacement. Yourmechanic’s technicians bring the dealership to you by performing this job at your home or office 7 days a week between 7AM-9PM. We currently cover over 10k cities and have 100k+ 5-star reviews... LEARN MORE

SEE PRICING & SCHEDULING

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Recent Brake Pad Replacement reviews

Excellent Rating


YourMechanic Brake Pad Replacement Service

Average Rating

4.9/5

Number of Reviews

10,770

Rating Summary
10,265
323
67
33
82
10,265
323
67
33
82

Arturo

25 years of experience
42 reviews
Arturo
25 years of experience
Volkswagen Tiguan - Brake Pads Replacement (Rear) - La Jolla, California
Arturo was efficient and extremely professional. I'll refer him to friends and family and call him for any issues related to my car. I am very happy with the service!
Kia Forte - Brake Pads Replacement (Front) - San Diego, California
ARTURO is great! very professional , fast, replaced my front brake pads and oil an filter change. everything now works and works well. Brakes have much improved stopping power and engine is smooth and quiet.Arturo is also kind and thoughtful. "Your mechanic" is very fortunate to have Arturo Lopez represent your company. I enthusiastically recommend him and "Your mechanic> as a fine operation Best regards to the Team Peter Marto

Travis

11 years of experience
312 reviews
Travis
11 years of experience
Ford Explorer Sport Trac - Brake Pads Replacement (Rear) - Minneapolis, Minnesota
Travis is great! This is the second time he has come and serviced our truck. I recommend Travis for any service ned you may have!
Subaru Forester - Brake Pads Replacement (Front, Rear) - Rosemount, Minnesota
Thank you Travis for your fast, easy, honest work on my vehicle today!! The first thing you did upon arrival to my home was find me a discount coupon for $50 off my service estimate. You did only what needed to be done in record time. You not only saved me lots of money, but did things in a profession manner. I've been looking for an honest auto mechanic for my whole life and would love for you to be it!! Thank you, thank you, thank you!! You're the best!!!

Scott

32 years of experience
346 reviews
Scott
32 years of experience
Hyundai Sonata - Brake Pads Replacement (Front, Rear) - Denver, Colorado
Arrived on time and worked quickly. Gave me detailed information on his completed work and the details of my car. Answered all of my questions thoroughly.
Lexus IS250 - Brake Pads Replacement (Rear) - Denver, Colorado
Always on time, speedy, professional, and pleasant to interact with. The work is always consistent and we'll done. I can't reccomend Scott highly enough!

Nicholas

9 years of experience
251 reviews
Nicholas
9 years of experience
Lexus GX470 - Brake Pads Replacement (Rear) - Clayton, North Carolina
Nicholas texted me 30 minutes prior to arrival. Showed up on time as scheduled. He confirmed the work that I requested be performed. He completed the work, performed the road tested, and delivered my keys along with recommendations of other work that might be in my best interest. Was very pleasant, professional, and cleaned up after he was done. I was so impressed with the service he performed and the speed at which the services were completed. I have already scheduled a future service with Nicholas and will schedule any and all future repairs with him if he is available.

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE