P2747 is meant for the case where sensor B stays silent although the car is clearly moving. No manufacturer documents P2747 publicly. Ford's 2024 summary describes exactly this test for its intermediate sensors – vehicle inferred to be driving under positive torque, yet the sensor shows under 250 rpm lasting 2.5 s – but for sensor B it names only P2745, P2746 and P2748, so Ford apparently files missing pulses elsewhere. For the older single-sensor layout, Ford's 2012 strategy flags the intermediate shaft below 250 rpm for 5 s with turbine and output turning. Typical reasons are a sensor that has died internally, an open supply, or a reluctor that no longer passes the sensor. The module substitutes a calculated speed or goes into limp mode.
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 and transmission message while driving
- Limp-home mode, often stuck in one gear
- Rough or missing upshifts
Most likely causes
- Sensor B failed internally and delivers no pulses
- Open supply or signal wire, unplugged connector
- Reluctor ring displaced or sensor not seated in its bore
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.
- It affects emissions.
What each character of P2747 means
- P: Powertrain: engine and transmission
- 2: Generic code: same on every make
- 7: Transmission
- 47: Specific fault in that system
Frequently asked questions
Can I keep driving with code P2747?
Drive gently to a repair shop. If it slips, you hear clunks, or it loses its gears, do not keep driving.
What causes code P2747?
The most common causes are: sensor B failed internally and delivers no pulses; open supply or signal wire, unplugged connector; reluctor ring displaced or sensor not seated in its bore.
Related codes
- P2745Intermediate Shaft Speed Sensor B Circuit
- P2746Intermediate Shaft Speed Sensor B Circuit Range/Performance
- P2748Intermediate Shaft Speed Sensor B Circuit Intermittent
- P0793Intermediate Shaft Speed Sensor A Circuit No Signal
- P2751Intermediate Shaft Speed Sensor C Circuit No Signal
Sources
- fordservicecontent.com: OBDSM2400OUTPUT 16Jul2024 WSM final V2 MCS7001
- newtonnet.co.uk: fordobd2012
- law.cornell.edu: 13 CCR 1968.2
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.