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P0027 is a diagnostic trouble code (DTC) for "Exhaust Valve Control Solenoid Circuit Range/Performance (Bank 1)". 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.
Exhaust Valve Control Solenoid Circuit Range/Performance (Bank 1)
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.
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.
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.
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.
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.
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.
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.