P0A14 fault code: Engine Mount Control Circuit/Open
Last updated · OBDCode UK editorial
Limit driving to essential journeys. Avoid long trips and heavy loads. Book diagnosis soon — if the car overheats, loses power, or feels unsafe, stop and arrange recovery. If you see damaged orange high-voltage cables, stay clear and arrange recovery — do not probe the high-voltage system.
Can I DIY?
Do not DIY this repair. We do not publish DIY repair or strip-down steps for this code on this page. Read codes and observe only; leave the repair to a qualified garage.
This fault is in the professional-only category. We do not publish strip-down or fitting steps on this page. Use a qualified garage.
Never go under a car held only by a jack. Use axle stands on the handbook support points, on firm level ground, with wheel chocks. No roadside or slopes. Rock-test before you go under.
On a 12V battery: disconnect negative first, reconnect negative last. Prevent sparks and short circuits. Stop if the battery is damaged or sits near orange high-voltage cables.
What does P0A14 mean?
P0A14 is a generic (SAE standard) powertrain code reported by your car’s engine control unit. It sits in the P0Axx block, which covers hybrid propulsion. The stored description is “Engine Mount Control Circuit/Open”. The code itself tells you which circuit or system tripped the fault — not always the exact part that failed.
Will P0A14 fail an MOT?
An illuminated engine management light is a Major defect at MOT since 2018 — an automatic fail until the fault is repaired and the light stays off. Clearing the code without fixing the cause is not a repair.
Before booking your test, check what usually fails on your car: see our MOT pass rates by make and model, built from 33.1 million DVSA tests.
What the MOT data says
No MOT certificate item corresponds to this code; MOT outcome data cannot be shown.
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P0A14 — quick answers
Is it safe to drive with P0A14?
Drive only if essential. Limit driving to essential journeys. Avoid long trips and heavy loads. Book diagnosis soon — if the car overheats, loses power, or feels unsafe, stop and arrange recovery. If you see damaged orange high-voltage cables, stay clear and arrange recovery — do not probe the high-voltage system.
Can I fix P0A14 myself?
Do not DIY this repair. We do not publish DIY repair or strip-down steps for this code on this page. Read codes and observe only; leave the repair to a qualified garage. Specialist tools or workshop equipment — typically a professional garage job.
Will P0A14 fail my MOT?
An illuminated engine management light is a Major defect at MOT since 2018 — an automatic fail until the fault is repaired and the light stays off. Clearing the code without fixing the cause is not a repair.
Fault-code identifiers are standard diagnostic facts. Their explanations and diagnostic guidance on this site are original editorial summaries, not reproduced SAE wording. MOT defect rules reflect the DVSA MOT inspection manual (2026). This page is general guidance for UK drivers, not a substitute for a professional diagnosis.