B105000 on Seat: Function limitation due to excessive temperature
Diagnostic trouble code B105000 on Seat vehicles — what it means, the common
causes, and how to confirm the real fault before replacing parts.
What does B105000 mean?
B105000 indicates: Function limitation due to excessive temperature.
This relates to the Body system.
Common causes of B105000
Transmission control module (TCM) internal temperature exceeding approximately 135°C (275°F) as measured by one of the two temperature sensors in the TCM
ATF (Automatic Transmission Fluid) overheating causing excessive heat input to the integrated transmission control module
Excessive engine torque/heat input leading to sustained high transmission temperatures
What to check (live data)
Transmission control module internal temperature (threshold: ~135°C / 275°F triggers torque reduction; ~145°C / 293°F results in engine at idle)
Engine torque value (reduced gradually from threshold up to idle as protection measure)
ATF/clutch cooling oil temperature
Parts often involved in B105000
Transmission control module (integrated into transmission housing, lubricated by ATF)
Temperature sensors within the transmission control module (two sensors)
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 B105000 — 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.
B105000 is a diagnostic trouble code: Function limitation due to excessive temperature.
What are the common causes of B105000 on a Seat?
Common causes include: Transmission control module (TCM) internal temperature exceeding approximately 135°C (275°F) as measured by one of the two temperature sensors in the TCM, ATF (Automatic Transmission Fluid) overheating causing excessive heat input to the integrated transmission control module, Excessive engine torque/heat input leading to sustained high transmission temperatures. The exact cause depends on the vehicle — confirm it before replacing parts.
Can I keep driving a Seat with B105000?
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 B105000 on a Seat?
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 B105000 on your specific Seat.