Skip the auto shop - Our mechanics make house calls
  1. Home
  2. Articles
  3. P0086 OBD-II Trouble Code: Exhaust Valve Control Solenoid Circuit High (Bank 2)

P0086 OBD-II Trouble Code: Exhaust Valve Control Solenoid Circuit High (Bank 2)

Check Engine Light

P0086 trouble code definition

P0086 is a OBD2 diagnostic trouble code indicating a fault within the exhaust valve control circuit. This code is similar to P0085 and P0084.

What the P0086 code means

P0086 is a DTC when high voltage is found in the exhaust valve control solenoid circuit bank 2. The fault is triggered when the ECU tries to control the solenoid and finds the voltage to be out of range with high voltage present, this triggers a Check Engine Light to be set on the dashboard. Once this light is set the vehicle is put into a failsafe mode to prevent damage and disabling variable valve timing.

What causes the P0086 code?

  • Failed bank 2 exhaust valve control solenoid
  • ECU that has failed
  • Poor electrical connection
  • Wiring harness that has an open or short

What are the symptoms of the P0086 code?

Any felt symptoms will be preceded by the Check Engine Light being displayed on the dash. Once this Check Engine Light is set, a failsafe mode is set to prevent any further damage to the vehicle or engine.

This disabled the variable valve timing which may decrease fuel economy and result in slower than normal vehicle acceleration. The failsafe mode will remain until the code is cleared or the fault is resolved.

How does a mechanic diagnose the P0086 code?

  • A scan tool is used to check for any codes present.

  • All of the freeze frame data associated with each code will be checked to tell us about the conditions that the code was triggered under.

  • The codes will then be cleared and the vehicle will be taken on a test drive under similar conditions as the freeze frame data.

  • Once the code is seen again on the test drive, a visual inspection will be performed to look for any damage, loose connections, or shorted wiring.

  • The scan tool will then be used to monitor live solenoid operation.

  • If the solenoid passes all tests, then the ECU will need to be tested by manufacturer specific testing procedures.

Common mistakes when diagnosing the P0086 code

  • Most commonly mistakes are made when steps are not followed or are skipped entirely.

  • The solenoid operation must be tested before it is replaced, even though it is normally the cause of P0086.

How serious is the P0086 code?

P0086 should not prevent the vehicle from being driven to a safe location after the DTC is set. Though caution should be taken with the vehicle if it has a lack of power when acceleration and poor gas milage. The vehicle will operate normally once the fault is repaired.

What repairs can fix the P0086 code?

Additional comments for consideration regarding the P0086 code

The Variable valve timing system uses the ECU to control the bank 1 and 2 intake and exhaust control solenoids. This system is used to change valve timing as needed to increase engine power and offer improved fuel economy.

Bank 2 is typically found on the passenger side of the engine compartment. The exhaust valve solenoid is usually located near the exhaust manifold on the engine cylinder head.

An advanced scan tool is required to properly diagnose P0086. These scan tools offer the ability to view sensor and solenoid operation and its changes over time. This helps technicians diagnose electrical issues especially intermittent faults that would otherwise be hard to track down.

Need help with a P0086 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.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

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

More related articles

The Traveler’s Guide to Driving in Malaysia
CraigBurrows / Shutterstock.com Malaysia is a popular destination for many tourists today. The country has amazing sights and attractions that you will want to explore....
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...

Related questions

Q: Why did my Check Engine come on?

Hello. This could be from a gas cap left loose or an air filter not sealed back up correctly. Take the car back to the oil change company and they should be able to scan the car to see if...

Q: when driving speed slow down and resume to speed it begins to jerk i have to put in over drive to resume speed especially on hiway

You should have the vehicle scanned. The data from the speed sensor needs to be checked to see if the transmission or engine is the cause of the jerking. You may have a transmission solenoid that's not shifting correctly, an...

Q: Computer reads an issue with the oxygen sensor on a Subaru Forester 1999 2.0 Turbo. What is the problem?

Your 1999 Subaru Forester has pre and post catalytic converter oxygen sensors. The pre-converter sensor optimizes fuel trim while the post converter sensor monitors the efficiency of the catalytic converter. A failing pre-converter sensor will degrade vehicle MPG performance. Although...