P3446 OBD-II Trouble Code: Cylinder 6 Exhaust Valve Control Performance

Our certified mechanics come to you · Get a fair and transparent estimate upfront

Red-stars EXCELLENT RATING ON

Cost of diagnosing the P3446 code

P3446 is a diagnostic trouble code (DTC) for "Cylinder 6 Exhaust 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. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 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$20.00
Toyota$20.00
BMW$20.00
SCHEDULE P3446 DIAGNOSTIC Get a fair and transparent estimate upfront

P3446 code definition

The P3446 code indicates that the PCM has detected a range of voltage values from the mass airflow sensor, the intake control manifold absolute pressure sensor, and the throttle position sensor, all within cylinder 6, that are not within the correct range, as compared to the manufacturer’s specifications. This code is very similar to the P3478 code, which represents the same issue within cylinder 10.

What the P3446 code means

In order to provide maximum fuel efficiency, certain cylinders are shut down during specific driving conditions. The PCM will instruct the cylinder deactivation solenoids to begin the process, which involves restricting the flow of oil to the valve lifts, which then stops the exhaust valve from opening. Using the data from the various sensors, the PCM can tell if the exhaust valve is operating normally. If the data does not match the specified voltage reading, the PCM will store the P3446 code.

What causes the P3446 code?

The P3446 code could be caused by any of the following:

  • Low oil pressure
  • Faulty throttle position sensor
  • Clogged oil passages
  • Faulty lifters
  • Faulty cylinder deactivation solenoid
  • Faulty mass airflow sensor, or faulty intake control manifold absolute pressure sensor
  • Faulty electrical components within the circuit, including wiring, harnesses, or connectors

What are the symptoms of the P3446 code?

In addition to the illuminated Check Engine Light, drivers may notice that the engine vibrates during operation.

How does a mechanic diagnose the P3446 code?

With this type of code, it is important to check the PCM for other stored codes, and to diagnose and repair those codes first. If after repairing any other codes within the PCM, the P3446 code is still reappearing, then the mechanic should check the engine oil pressure and oil levels. A visual inspection of all electrical components should follow, and any damaged elements should be repaired or replaced as necessary.

The code should be cleared from the PCM, and the system should be retested after each potential repair. The next step is to test the cylinder deactivation solenoid using a scan tool, and then to examine the oil passages for any debris that could be clogging them. Finally, the solenoid should be replaced if none of the other repairs have diagnosed the issue.

Common mistakes when diagnosing the P3446 code

The biggest mistake reported by technicians is forgetting to check the oil passages for clogs. This can cause a decrease in oil pressure, which prevents the cylinder deactivation solenoids from operating correctly. These passageways should always be checked and cleared if necessary.

How serious is the P3446 code?

This code represents an issue that should be repaired as soon as possible. If the P3446 code is ignored, it can lead to heavy damage to other areas of the engine, which can lead to expensive repairs in the future.

What repairs can fix the P3446 code?

In order to repair the P3446 code, a mechanic may attempt any of the following:

Need help with a P3446 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.

trouble codes
Check Engine Light
P3446

No more waiting rooms! Our mechanics will come to you to diagnose and fix the P3446 code.

SCHEDULE P3446 DIAGNOSTIC
Get a $20 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.8/5

Number of Reviews

5,010

Rating Summary
4,615
191
48
28
128
4,615
191
48
28
128

Kenneth

19 years of experience
509 reviews
Kenneth
19 years of experience
Toyota Sequoia - Check Engine Light is on - Newport Beach, California
Kenneth did a great job and very knowledgeable. He has a great attitude and I will for sure be using him again.

Richard

11 years of experience
45 reviews
Richard
11 years of experience
Honda Civic - Check Engine Light is on - Tucson, Arizona
Had damage to wires leading to a coil and was unable to drive the car to a service center so I took a chance on having somebody come out to work on the car. It couldn't of worked out any better. Would definitely recommend Richard to anybody needing car service.

Clifton

29 years of experience
207 reviews
Clifton
29 years of experience
Dodge Ram 1500 - Check Engine Light is on - Lake Worth, Florida
Clifton was on time and very professional. I will definitely recommend him to my friends and family.

Walter

45 years of experience
85 reviews
Walter
45 years of experience
Nissan Sentra - Check Engine Light is on - Tulsa, Oklahoma
Very helpful and knowledgeable. Appreciate the friendliness on top of it, would definitely recommend.


More related articles

P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one cylinder. A P2428 trouble code is also associated...
P0361 OBD-II Trouble Code: Ignition Coil K Primary / Secondary Circuit Malfunction
Trouble code P0361 means that a malfunction in an ignition coil, often due to an open or short in the driver circuit.
B1911 OBD-II Trouble Code: Air Bag Diagnostic Monitor Ground Circuit Short to Battery
B1911 means there is a malfunctioning circuit in the airbag diagnostic monitor, probably due to an electrical problem or faulty monitor.

Related questions

My 3 year old water pump is leaking. Is it covered under warranty?

Whether Pep Boys should warranty the water pump or not is only dependent on the warranty details. I can say that most warranties from repair shops are for twelve months and 12,000 miles. You will need to refer to the...

Ecu problem wanting to make sure

You need to have some of the codes like the first three diagnosed using the proper pinpoint tests until a problem is found. You may have an electrical harness short or a cut that is causing all the codes. Only...

Car vibrating and losing power.

Your symptoms could be caused by many things, from a clogged catalytic converter to failed mass air flow sensor. The first step is to retrieve the diagnostic trouble code (DTC). This provides a starting point for the diagnostic procedure. A...

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