OBD-II code · Powertrain (generic)
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.
Is it safe to drive with P0027?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyOil control valve clogged with sludge
- PossibleLow oil pressure or wrong oil viscosity
- PossibleCamshaft phaser worn
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 1–4 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Exhaust Camshaft Oil Control Valve, Camshaft Phaser, Engine Oil, Timing Chain
Related codes
- P0029Exhaust Valve Control Solenoid Circuit Range/Performance Bank 2
- P0024"B" Camshaft Position - Timing Over-Advanced (Bank 2)
- P0025"B" Camshaft Position - Timing Over-Retarded (Bank 2)
- P0026Intake Valve Control Solenoid Circuit Range/Performance (Bank 1)
- P0028Intake Valve Control Solenoid Circuit Range/Performance (Bank 2)
- P002AB Camshaft Profile Actuator A Control Circuit/Open Bank 1
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.