P2741 flags a sensor B signal that is electrically intact but physically impossible or inconsistent. The clearest published test is a rate check: GM's 2023/24 dual-clutch module calls the cooler-outlet reading faulty when its filtered gradient exceeds 700 °C per second, confirmed over five samples, as a Type B code (MIL after two trips). Mitsubishi's Twin Clutch SST in the 2009 Lancer uses a jump of 10 °C or more within 80 ms, lasting 400 ms; there the sensor sits in the transaxle-mounted control unit, so a returning code means replacing the transaxle. Ford lists P2741 as the consistency check of the TR9070 cooler-out sensor. Unlike P2742/P2743 the voltage stays in range; a loose pin or sensor drift is typical.
Medium severity. Can I keep driving?Drive gently to a repair shop. If it slips, you hear clunks, or it loses its gears, do not keep driving.
Symptoms
- Warning lamp after repeated detection
- Fluid temperature B jumps on the scan tool
- Temperature-dependent clutch or cooler control restricted
Most likely causes
- Contact resistance or loose pin causing signal jumps
- Sensor B thermistor drifting or responding erratically
- Fault in a control unit with built-in sensor (e.g. Mitsubishi TC-SST)
What to check, in order
Start with the simplest. You can tick off each step.
Good to know
- Repair difficulty: hard
- It can trigger limp mode.
What each character of P2741 means
- P: Powertrain: engine and transmission
- 2: Generic code: same on every make
- 7: Transmission
- 41: Specific fault in that system
Frequently asked questions
Can I keep driving with code P2741?
Drive gently to a repair shop. If it slips, you hear clunks, or it loses its gears, do not keep driving.
What causes code P2741?
The most common causes are: contact resistance or loose pin causing signal jumps; sensor B thermistor drifting or responding erratically; fault in a control unit with built-in sensor (e.g. Mitsubishi TC-SST).
Related codes
- P2740Transmission Fluid Temperature Sensor B Circuit
- P2742Transmission Fluid Temperature Sensor B Circuit Low
- P2743Transmission Fluid Temperature Sensor B Circuit High
- P2744Transmission Fluid Temperature Sensor B Circuit Intermittent
- P0711Transmission Fluid Temperature Sensor A Circuit Range/Performance
Sources
- gsi.ext.gm.com: 23OBDG07
- gsi.ext.gm.com: 24OBDG07
- mitsubishitechinfo.com: M122502250020000USA
- fordservicecontent.com: OBDSM2400OUTPUT 16Jul2024 WSM final V2 MCS7001
Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.