P3426 OBD-II Trouble Code: Cylinder 4 Deactivation/Intake Valve Control Performance

Our certified mechanics come to you · 12-month, 12,000-mile warranty

SCHEDULE P3426 DIAGNOSTIC Get a fair and transparent estimate upfront
Red-stars EXCELLENT RATING ON

Cost of diagnosing the P3426 code

P3426 is a diagnostic trouble code (DTC) for "Cylinder 4 Deactivation/Intake Valve Control Performance". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $70.00. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $30.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford$70.00$30.00
Toyota$70.00$30.00
BMW$70.00$30.00
SCHEDULE P3426 DIAGNOSTIC Get a fair and transparent estimate upfront

check engine light

P3426 code definition

The P3426 code indicates that the deactivation performance of the cylinder 4 valve is not within the correct range.

What the P3426 code means

In order to maximize fuel economy, certain cylinders will be deactivated during specific driving conditions. This is accomplished by not allowing an intake valve to open on the cylinder. Data is measured by the MAF sensor, the MAP sensor, and the TP sensor to ensure that the cylinder deactivation was performed correctly. If this data does not match the manufacturer’s specifications in relation to the deactivation of cylinder 4, the P3426 code will be stored.

What causes the P3426 code?

The most probable causes for the P3426 code include:

  • Low oil pressure
  • Faulty cylinder deactivation solenoid
  • Restricted oil passage
  • Open or shorted cylinder deactivation solenoid harness
  • Poor electrical connection in the cylinder deactivation solenoid circuit
  • Faulty MAF, MAP, or TP sensors

What are the symptoms of the P3426 code?

When the P3426 code is detected, the Check Engine Light will be illuminated. It may take more than one drive cycle for this indicator to be activated.

How does a mechanic diagnose the P3426 code?

After an OBD-II scanner detects the P3426 code, a technician should perform a visual inspection of all the wiring, connectors, and other components related to the cylinder intake valve, as well as to the MAF sensor, the MAP sensor, and the TP sensor; any damaged components should be replaced, reconnected, or repaired as necessary. After the code is cleared, they should then retest the system. If the code returns, then the P3426 code points to a larger issue that should be repaired.

How serious is the P3426 code?

If the P3426 code is being detected, repairs should be made as soon as possible. While a driver may or may not notice any chance in their vehicle’s performance due to the cause of this code, the engine’s inability to control the intake valve of a cylinder may result in a more serious issue in the future.

What repairs can fix the P3426 code?

There are many ways that a mechanic may address a P3426 code detection. They include:

  • Replacing a faulty cylinder deactivation solenoid.

  • Clearing a restricted oil passage.

  • Replacing or repairing an open or shorted cylinder deactivation solenoid harness.

  • Replacing electrical components in the cylinder deactivation solenoid circuit to improve the connection.

  • Replacing faulty MAF, MAP, or TP sensors.

Need help with a P3426 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 or speak to a service advisor at 1-800-701-6230.

P3426
trouble codes
Check Engine Light

Fast and easy Check Engine Light is on Inspection service at your home or office.

SCHEDULE P3426 DIAGNOSTIC
Get a fair and transparent estimate upfront

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.5/5

Number of Reviews

3,901

Rating Summary
3,566
166
43
25
101
3,566
166
43
25
101

Kenneth

17 years of experience
374 reviews
Kenneth
17 years of experience
Great Mechanics and knowledgeable
1998 FORD MUSTANG - CHECK ENGINE LIGHT IS ON - HUNTINGTON PARK, CALIFORNIA

Damian

8 years of experience
153 reviews
Damian
8 years of experience
On time, courteous and knowledgeable. Will highly recommend! I am at peace!
2005 TOYOTA SEQUOIA - CHECK ENGINE LIGHT IS ON - KISSIMMEE, FLORIDA

Kenneth

17 years of experience
374 reviews
Kenneth
17 years of experience
Kenneth was extremely knowledgeable. He explained the results of my vehicle diagnosis in terms easy to understand.
2003 GMC YUKON - CHECK ENGINE LIGHT IS ON - LOS ANGELES, CALIFORNIA

Peter

40 years of experience
1059 reviews
Peter
40 years of experience
Peter was great. He arrived on time, ran the diagnostic to assess the problem, and informed me of next steps. I am currently booking the service to complete the repair...
2013 VOLKSWAGEN GTI - CHECK ENGINE LIGHT IS ON - PHOENIX, ARIZONA

More related articles

Veteran and Military Driver Laws and Benefits in New Mexico
The state of New Mexico offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
Auto Safety Tips
Driving is more than a way to get from point A to point B. Owning and driving a car can also be a highly enjoyable experience. Whether a person is driving...

Related questions

Q: Trouble starting car when cold

The starting issues scream timing. The typical causes that set these codes are the cam and crank position sensors. The only option you have not tried to my knowledge is the camshaft position sensor. I would start there. With all...

Q: P2107 - 2005 Ford Freestyle

Hello. P2107 is the code for an issue with the vehicle's throttle control module processor. Basically, the computer has detected an issue with the vehicle's electronic throttle body and has put the vehicle in safe mode. The throttle body...

Q: Crank but not start, There is spark and fuel spray in injector, I change the PCM and distributor box but still the same no start

If you are getting spark and fuel to the engine then the only thing left to check is the compression in the engine. Have a compression test done to see if the timing belt may have jumped timing. You should...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1-800-701-6230 · hi@yourmechanic.com