P0A14
Engine Mount Control Circuit/Open
- Severity
- Low
- Driving
- Drivable — book it in
The control circuit for an electronically controlled engine mount is open - a broken wire, a disconnected plug, or a failed mount solenoid. These mounts change their stiffness on command, and on a hybrid they earn their keep at the moment the engine starts and stops while the car is moving: a soft mount absorbs the shudder that would otherwise reach the cabin. With the mount uncontrolled it reverts to a fixed state, so the car becomes rougher rather than unsafe. This is a comfort fault in a system full of serious ones, and it is rated accordingly.
Possible causes
- CommonFailed mount solenoid or actuator
- CommonCorroded or damaged connector at the mount
- CommonWiring chafed where it crosses the engine, which moves constantly
- CommonVacuum line split or disconnected, on vacuum-actuated mounts
- PossibleBlown fuse
- RareFailed driver inside the control module
What you might notice
- Vibration through the cabin, worst at idle
- A noticeable shudder as the engine starts or stops
- Booming or droning at certain engine speeds
- Check engine light on
- No effect on power or on how the car drives otherwise
What to check, in order
- Inspect the connector and the wiring at the mount. It sits on a component that moves under every gearchange, so chafed wiring is the usual answer.
- On a vacuum-actuated mount, check the vacuum line for splits and for a line that has come off. This is common and costs nothing to fix.
- Measure the solenoid's resistance against specification.
- Check the mount's physical condition while you are there. A mount whose rubber has collapsed produces the same vibration and will not be fixed electrically.
- Do not disturb anything orange.
Read this code from your own car
Plug an ELM327 adapter into the OBD-II port under the dashboard. Pin16 reads every stored, pending and permanent code, explains each one like this page does — offline, with no account — and shows what the car recorded when the fault was set.