Skip the auto shop - Our mechanics make house calls

P0027 OBD-II Trouble Code: Exhaust Valve Control Solenoid Circuit Range/Performance (Bank 1)

check engine light

P0027 trouble code definition

Exhaust Valve Control Solenoid Circuit Range/Performance (Bank 1)

What the P0027 code means

P0027 is the OBD-II generic code indicating the engine control module (ECM) has determined that the variable valve lift for the exhaust valves on bank 1 of the engine takes too long to engage or does not engage.

What causes the P0027 code?

  • The ECM activates the exhaust valve solenoid without change to the different lift position.

  • The exhaust valve lift solenoid has an open or short circuit causing the valve lift to not change.

  • The wiring or connections to the exhaust valve lift solenoid is damaged causing a short or open circuit.

  • The ECM is defective or the connection to the ECM is loosing contact.

What are the symptoms of the P0027 code?

  • The engine lacks power depending on valve lift failed positions.

  • The engine may hesitate or stall on acceleration.

  • The engine will run erratic if the exhaust valves failed in the wrong lift position that is normal.

  • The Check Engine Light will come on indicating a problem with the system.

How does a mechanic diagnose the P0027 code?

  • Performs a visual check of the wire harness and connections for chafing or bad connections

  • Clears all of the engine codes to verify if the code returns

  • Utilizes a test control solenoid to diagnose the valve train lift operation

  • Checks the lift control solenoid for a short or open circuit, replaces the solenoid if it fails the test

  • Follows the manufacturer's specific pinpoint tests for further diagnosis of the wiring or ECM.

Common mistakes when diagnosing the P0027 code

Follow these simple guidelines to prevent mistakes:

  • Clear the code and retest system to verify the failure in the variable valve lift system.

  • Use the special tools that are necessary for proper testing.

  • Follow the pinpoint test, step by step, to isolate the failure on the system.

  • Only replace parts when directed by the pinpoint and visual test procedure.

How serious is the P0027 code?

  • The engine may run erratic, stall, or hesitate.
  • The engine may run rough and have a reduced fuel mileage.
  • The engine may start very hard or not start at all if the ECM has failed.

What repairs can fix the P0027 code?

  • Clear the fault codes and perform a road test.
  • Replacing the exhaust valve lift solenoid.
  • Repairing or replacing the wiring or connection to the exhaust lift solenoid.
  • Repairing the ECM connector or replacing the ECM.

Additional comments for consideration regarding the P0027 code

The exhaust valve lift mechanism may bind from engine sludge build up or oil passages clogged. This can cause the shift mechanism to not move and the ECM will set the code.

Need help with a P0027 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 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...
P0359 OBD-II Trouble Code: Ignition Coil I Primary/Secondary Circuit Malfunction
P0359 code definition The P0359 code indicates that a fault has been detected in one of the vehicle’s ignition coils, generally the number 9 coil. This code can also be associated...


Related questions

Q: Emission and Suspension

Hello. To address the converter, there is no cure for a failing converter. In many cases, these cleaners will clean out some of the build up in the converter but definitely not all of it. You will end up needing...

Q: My car is misfiring

Our mechanics will use a scanning tool that may or may not be similar to the same one you have used, however the majority of the scanning tools used on the market today are designed to read the same information....

Q: What does the loose fuel cap warning mean?

If you see the loose fuel cap warning shown in the vehicle information display, it usually means that the gas cap isn’t screwed down all the way. If the gas cap’s seal doesn’t lock in, the system will detect a...