Drive with caution — fix soon.
This code means the transmission fluid temperature sensor circuit is showing a voltage that's too low, which the computer reads as an unrealistically cold or shorted signal. Because the reading isn't believable, the transmission may switch to a default shift strategy to protect itself. It's most often caused by a short to ground in the wiring, a failed sensor, or a bad connector, and is usually a manageable repair.
$150 – $400
Varies by vehicle and root cause.
For short trips, usually yes, but don't rely on it long-term. The computer is getting an impossibly low temperature reading, so it can't protect the transmission from real overheating and may shift harshly. Have it diagnosed soon.
Most repairs land between $150 and $400. Fixing a shorted wire or corroded connector is cheaper, while replacing the temperature sensor, particularly an internal one, raises the cost. Diagnostic time to find the short is usually part of the bill.
It's moderate. You're unlikely to be stranded, but the false low reading means the transmission can overheat without warning, which can shorten its life. Prompt repair keeps that risk in check.
When the computer sees an unrealistically cold fluid reading, it often defaults to firmer, more protective shifts because it can't fine-tune them based on real temperature. Once the sensor signal is restored, normal smooth shifting usually returns.