Exhaust Valve Control Solenoid Circuit Range/Performance (Bank 2)
The exhaust valve solenoid on bank 2 isn't opening or closing properly, like a stuck valve in your home's water system that won't respond to commands. The engine's computer detected the valve isn't moving through its full range or is responding too slowly.
The ECM monitors electrical resistance and response time of the exhaust valve solenoid circuit on bank 2. It commands the solenoid to open/close and measures if the valve moves within expected timing and current parameters. If the solenoid doesn't respond quickly enough or draws abnormal current, the fault is triggered.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Solenoid Response Time | 50-200 milliseconds | >200ms or no movement detected |
| Circuit Current Draw | 0.5-2.0 Amps | >2.5A or <0.3A |
Code P0027 is a moderate fault. You can generally drive to a workshop, but avoid long trips or high-load driving (motorway, uphill towing) until it is diagnosed. If the code keeps returning after clearing, or if you notice the symptoms listed above worsening, do not delay professional diagnosis. Many moderate codes have multiple possible root causes — a mechanic with live OBD data can identify the exact fault more efficiently than part-by-part trial and error.
Once the fault is repaired, P0027 can be cleared using any OBD-II scanner. Connect the scanner, navigate to "Clear Codes" or "Erase DTCs," and confirm. The check engine light turns off immediately.
The code will return if the root cause was not actually fixed. The ECM re-detects the fault within 1–3 drive cycles and sets the code again.