OBD-II Code
P0A14
Severity
Not yet reviewed
Nobody on our side has assessed this code yet, so we are not going to guess at how serious it is.
Can you drive it
We cannot say
Treat it as unknown until a shop reads it with live data. If the check-engine light is FLASHING, stop driving as soon as it is safe to — that means an active misfire, whatever the code.
Indicative cost (USD)
$400–$900
From this code's diagnostic notes. Varies by vehicle, diagnosis, parts, and local labor. This is not a repair quote.
P0A14 is set when the active engine mount control system (used on the Prius and a small number of other hybrids to actively damp engine-on/engine-off transitions that would otherwise be felt as a lurch in the cabin) does not deliver the commanded actuator response.
How a shop works this
Work from evidence to part, not the other way round. A code names a circuit or a symptom; it does not name the part that failed.
Note every code that is set, not just this one.
Codes that appear together usually narrow the cause faster than any one of them read alone.
Read the freeze frame — the conditions the fault was recorded under.
Cold or warm, idle or load, road speed and engine speed. A fault that only appears cold is a different fault from one that only appears under load, even with the same code on the scanner.
Confirm the fault is current rather than history.
Clear the code and see whether it returns under those same conditions. A code that does not come back may have been logged during a repair, a flat battery, or a bad connection that has since been disturbed.
Then follow the diagnostic notes further down this page, in the order they are written.
They are written in the order a shop works this code, cheapest checks first. Where they name a component, inspect its wiring and connector before replacing it.
If the code comes back after a repair, the underlying fault is still there. That is the point to bring in a scanner with live data and freeze-frame, or a shop that has one.
Common symptoms
- Check engine light
Read the full diagnostic procedureP0A14 is set when the active engine mount control system (used on the Prius and a small number of other hybrids to actively damp engine-on/engine-off…
P0A14 is set when the active engine mount control system (used on the Prius and a small number of other hybrids to actively damp engine-on/engine-off transitions that would otherwise be felt as a lurch in the cabin) does not deliver the commanded actuator response. Active engine mounts use either a hydraulic chamber with an electronic solenoid or a magnetorheological fluid with an electromagnet to vary mount stiffness in real time; the ECU commands a stiffness profile during HSD engine starts/stops to mask the NVH event.
Cheapest-first ladder
- visually inspect the mount itself for leaking hydraulic fluid (a leaking active mount is the dominant failure mode and is visually obvious from a wet mount body and fluid streaks down to the subframe); scan-tool the commanded actuator duty and the feedback hydraulic pressure (typical healthy active mount shows pressure feedback tracking command within 10-15% across the operating range, with peak pressures of 30-80 psi during engine-stop events); ohm the actuator solenoid (typical reading 5-15 ohms; open or shorted means coil failure).
- The expensive misdiagnosis is replacing the powertrain control module when the real fault is a $400 active mount that has bled out its fluid.
- DO NOT probe HV orange-wire circuits with a standard multimeter.
- Always service HV with Class 0 1000V gloves, isolation tester (Megger), and DC-rated lugged probes; the HV interlock loop drops pack contactors at service-plug removal and must never be bypassed.
Vehicle-specific patterns2010-2015 Toyota Prius Gen 3 (ZVW30) is the most common P0A14 vehicle; the active front engine mount fails most often around 80-120k miles from hydra…
- 2010-2015Toyota Prius Gen 3 (ZVW30) is the most common P0A14 vehicle; the active front engine mount fails most often around 80-120k miles from hydraulic fluid leakage and is a $350-500 part with a 2-3 hour replacement labor.
- 2012-2015Prius Plug-In shares the active mount with Gen 3 and the same failure pattern.
- 2007-2017Camry Hybrid throws P0A14 from active mount fluid loss; the part number differs from Prius but the diagnosis is identical.
- 2011-2017Highlander Hybrid uses a similar active mount on the front bank and throws the code with the same root cause.
- 2004-2009Prius Gen 2 uses a simpler passive mount and does NOT throw P0A14; this is a Gen 3 era code on Toyota platforms.
Estimated repair$400 to $900.
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