Drive with caution — fix soon.
This code sets when the transmission fluid temperature sensor reports a reading that's lower than the computer expects under the conditions, often pointing to a short to ground in the circuit or a degraded sensor. The computer treats the value as unreliable and may switch to a protective shift pattern. It's usually fixed by repairing a shorted wire, cleaning a connector, or replacing the temperature sensor.
$150 – $400
Varies by vehicle and root cause.
Usually yes for a little while, but don't ignore it. The sensor reading is out of range, so the computer can't trust the transmission temperature and may shift more cautiously. Have it checked soon to protect the transmission from undetected overheating.
Expect roughly $150 to $400. A wiring or connector repair is on the low end, while replacing the temperature sensor, especially one mounted inside the transmission, costs more. Diagnosis time is usually included up front.
It's moderate. It won't usually leave you stranded, but a faulty temperature reading removes a key safeguard against overheating. Addressing it promptly avoids the risk of heat damaging the transmission over time.
It means the sensor is still sending a signal, but the value is outside the believable range for the conditions, in this case reading too low. That usually points to a short in the wiring or a sensor that has drifted out of spec rather than a completely dead circuit.