P0027
Exhaust Valve Control Solenoid Circuit Range/Performance Bank 1
The ECU detects that the exhaust camshaft oil control valve on bank 1 does not respond to commanded duty cycle within expected limits. Camshaft phase deviates from target during phaser actuation tests.
The ECU detects that the exhaust camshaft oil control valve on bank 1 does not respond to commanded duty cycle within expected limits. Camshaft phase deviates from target during phaser actuation tests.
Common causes
- high
Oil control valve clogged with sludge
One of the most commonly reported causes for this code — check this first.
Typical part cost: $130-660
- medium
Low oil pressure or wrong oil viscosity
A plausible cause — test and verify before replacing parts.
Typical part cost: $130-660
See all causes + fix costs
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First things to check
- 1Confirm the code with a scan tool and check for additional related codes.
- 2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.
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Related codes
See related trouble codes
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Frequently asked questions
What does P0027 mean?
P0027 means "Exhaust Valve Control Solenoid Circuit Range/Performance Bank 1". It is a generic OBD-II code that points to a fault in the fuel & air metering / auxiliary emission controls.
What are the most common causes of P0027?
oil control valve clogged with sludge; low oil pressure or wrong oil viscosity; camshaft phaser worn — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.
Can I keep driving with this code?
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.
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