P178E00 on Skoda: Function limitation due to excessive temperature (Unauthorized)
Diagnostic trouble code P178E00 on Skoda vehicles — what it means, the common
causes, and how to confirm the real fault before replacing parts.
What does P178E00 mean?
P178E00 indicates: Function limitation due to excessive temperature (Unauthorized).
This relates to the Powertrain system.
Common causes of P178E00
excessive temperature of pump electronics (>160°C) causing pump shutdown
overtemperature condition in cooling system causing pump speed reduction
drive motor temperature sensor (G712) signal failure causing thermal management loss
What to check (live data)
pump electronics temperature (threshold: >160°C triggers shutdown)
coolant pump speed (reduced to 80% then 50% on overtemperature)
Measuring value block 109 / data block 109 (Audi A6)
engine temperature (enabling condition: >97.5°C)
supply voltage (overvoltage threshold: >20V)
Parts often involved in P178E00
Drive Motor Temperature Sensor G712
electrical auxiliary coolant pump
active coolant pump of internal combustion engine
Don't replace parts until the root cause is confirmed — many of these codes are caused by wiring, a connector or an upstream fault, not the part itself.
Get the confirmed root cause for P178E00 — on YOUR vehicle
A code is a symptom, not a diagnosis. AutoDX Pro cross-checks several
independent assessments, pinpoints the actual root cause, gives you the
exact tests to confirm it, and shows the parts — only after the cause is
confirmed. Reads your scan-tool photo and decodes your VIN with open
recalls.
P178E00 is a diagnostic trouble code: Function limitation due to excessive temperature (Unauthorized).
What are the common causes of P178E00 on a Skoda?
Common causes include: excessive temperature of pump electronics (>160°C) causing pump shutdown, overtemperature condition in cooling system causing pump speed reduction, drive motor temperature sensor (G712) signal failure causing thermal management loss. The exact cause depends on the vehicle — confirm it before replacing parts.
Can I keep driving a Skoda with P178E00?
It depends on the fault and your symptoms. Some causes are minor, others can damage components or affect safety. Get the root cause confirmed before deciding.
How do I fix P178E00 on a Skoda?
Confirm the actual root cause with targeted tests first, then replace only the part that's at fault. AutoDX Pro gives you the root cause, the exact tests, and the parts for P178E00 on your specific Skoda.