P0A15
Engine Mount Control Circuit Low
- Severity
- Low
- Driving
- Drivable — book it in
The engine mount control circuit is reading low - typically a short to earth. The mount cannot be controlled, so it stays at one stiffness instead of adapting. Expect more vibration than usual, particularly at idle and as the engine starts and stops, and nothing worse than that.
Possible causes
- CommonWiring a short to earth between the module and the mount
- CommonCorroded or water-damaged connector
- CommonFailed mount solenoid
- PossibleBlown fuse
- RareFailed driver inside the control module
What you might notice
- Vibration through the cabin at idle
- Shudder when the engine starts or stops
- Booming at certain engine speeds
- Check engine light on
What to check, in order
- Unplug the mount and check whether the low reading persists at the harness.
- Inspect the harness where it crosses between the body and the engine.
- Measure the solenoid's resistance against specification.
- Check the mount itself for collapsed rubber or leaking fluid before replacing anything electrical.
- 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.
Where this code sits
P00xxP01xxP02xxP03xxP04xxP05xxP06xxP07xxP08xxP09xxP0AxxP0BxxP0CxxP0DxxP0ExxP0FxxP10xxP11xxP12xxP13xxP14xxP15xxP16xxP17xxP18xxP19xxP1AxxP1BxxP1CxxP1DxxP1ExxP1FxxP20xxP21xxP22xxP23xxP24xxP25xxP26xxP27xxP28xxP29xxP2AxxP2BxxP2CxxP2DxxP2ExxP2FxxP30xxP31xxP32xxP33xxP34xxP35xxP36xxP37xxP38xxP39xxP3AxxP3BxxP3CxxP3DxxP3ExxP3Fxx