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

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How Long Does a Throttle Return Spring Last?
Not all vehicles on the road feature an electronic throttle control (ETC), which is also called drive-by-wire. For vehicles that don't offer this system, they have a throttle cable instead that...
How to Transfer a Car Title in Idaho
In order to prove ownership of a car, you must have the title. However, when a car is sold, given away or inherited, the title needs...


Related questions

Q: Remote start quit working, check engine light on

The last mention about the Check Engine Light being on is the key. You should have the computer scanned and tested to see why the Check Engine Light is on. The codes can be the reason the remote start is...

Q: Blowing fuse for turn, ABS, and Hvac fan, Also will start in any gear

Hello, thanks for writing in about your Chrysler Town & Country. If it will start in any gear, then there is more than likely a fault in the neutral safety circuit. It can be as simple as the neutral safety...

Q: Recently purchased car can't pass a smog check

Hello! I would definitely advise having a basic inspection done before the vehicle is driven on a long trip. Any qualified mechanic, such as one from YourMechanic, will be able to inspect your misfiring issue and let you know if...