P2746
Intermediate Shaft Speed Sensor B Circuit Range/Performance
Transmission
Generic OBD-II
Medium
What it means
P2746 means the transmission control module sees an implausible or out-of-range signal from the "B" intermediate shaft speed sensor, which reports how fast an internal shaft is turning. Bad speed data can cause erratic or harsh shifting and limp mode. It's usually a sensor, tone-ring, or wiring fault; the engine still starts and runs.
Medium
Can I keep driving? Drivable but may shift erratically or enter limp mode — the engine starts and runs fine; get it checked.
Common symptoms
What you'll notice
- Check-engine light on
- Erratic, harsh, or wrong-gear shifts
- Speedometer or gear indicator acting up
- Possible limp mode
Common causes
Most likely first
- Faulty intermediate shaft speed sensor BLikely
- Metal debris on the sensor tip or a damaged tone/reluctor ringCommon
- Wiring or connector fault (intermittent or high resistance)Common
- Low or dirty transmission fluid affecting readingsLess often
- Faulty TCM (rare)Less often
How to diagnose & fix
Work through it in order
- Read freeze-frame and compare intermediate, input, and output shaft speeds.
- Inspect the sensor and its connector; check for metal debris on the tip.
- Check the wiring for shorts, opens, or high resistance.
- Verify transmission fluid level and condition.
- Replace the speed sensor if the signal is out of range; clear and road-test.
FAQ
Quick answers
Is it safe to drive with P2746?+
Usually yes, but bad speed data can cause harsh or wrong-gear shifts and limp mode. The engine runs fine — get the sensor checked before it strands you in a fixed gear.
Can I just clear P2746?+
It returns once the transmission sees an implausible speed signal again. Fix the sensor, tone ring, or wiring to clear it for good.
Related codes
Often seen with P2746
Read & clear P2746 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX