P0027: Exhaust Valve Control Solenoid Circuit Range/Performance — Bank 1
What to do
Usually driveable. Check oil level and service history before parts are considered.
What this code means
The bank 1 exhaust valve control solenoid is not achieving what the module commands. Because exhaust valve timing and lift influence how much residual gas stays in the cylinder, faults here often surface first as an unstable idle rather than as a loss of peak power.
Likely causes
Start here
- Failed valve control solenoid · moderate
- Low or dirty engine oil · easy
- Clogged camshaft solenoid oil screen · easy
Less common
- Corroded or loose connector · easy
- Collapsed or stuck valve lifter · specialist
Symptoms
Components involved
Information, not instruction
CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.
Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Community experience
Be the first to write this up
Nothing posted about this yet. Whatever you found is worth writing down — even a dead end saves someone the same afternoon.
What makes one worth reading:
- The car — make, model, year and engine. The same fault behaves differently on each.
- What you measured, not only what you replaced.
- What actually fixed it — or that nothing did, which is worth knowing too.
Sign in or create an account to add what you found about P0027.