P1744 on Ford
Torque converter clutch slipping or not working as expected (Ford, Lincoln, Mercury, Mazda)
Severity: Inspect soon
The lock-up clutch is a monitored transmission output, and a code reference rates P1744 as severe because slipping can damage the transmission.
It gets more serious if:
- Not verified: The O/D OFF light blinks, the transmission slips, or it goes into limp-home mode. A Mazda owner reported slipping while passing, but we found no source saying whether you must stop
This page covers only what differs on Ford. For what P1744 means, the ranked causes and the test order, see the P1744 guide.
What's different on Ford
FordYour car
2013–2015 · Escape · 1.6L
Supported by vehicle dataFord TSB 19-2100 traces P0741 and/or P1744 on the 1.6L EcoBoost to internal torque converter damage. The bulletin is on NHTSA, but whether it is still current is not verified, so it is labelled vehicle data rather than confirmed.
2017–2018 · F-150
Supported by vehicle dataFord TSB 20-2117 traces P0741 and P1744 on early 10R80 vehicles to a sticking lock-up valve in the main control. The bulletin is on NHTSA, but whether it is still current is not verified, so it is labelled vehicle data rather than confirmed.
2013 · Edge
Supported by vehicle dataFord ASI-32271 links P0741 and P1744 with no other symptoms to a torn inner torque converter seal on several 2013 models. The bulletin is on NHTSA, but whether it is still current is not verified, so it is labelled vehicle data rather than confirmed.
14964Status unverified
MIL with P1744 (TCC slippage detected)
2000–2001zx2 · issued · NHTSA 622755
Gives P1744 as transmission / torque converter clutch slippage detected. Only the NHTSA flat-file summary was read, not the bulletin itself.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.
TSB 19-2100Status unverified
MIL with only P0741 and/or P1744
2013–2015escape · 1.6L · issued · NHTSA 10159457
Internal torque converter damage; repair or replace the converter. Only the NHTSA flat-file summary was read, not the bulletin itself.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.
ASI-32271Status unverified
P0741 and P1744 with no other symptoms
2013edge, flex, taurus, explorer · issued · NHTSA 10053427
May be caused by a torn inner torque converter seal. Also lists the Lincoln MKS and MKT. Only the NHTSA flat-file summary was read, not the bulletin itself.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.
TSB 20-2117Status unverified
10R80: MIL with P0741 and P1744
2017–2018f-150, expedition, mustang · issued · NHTSA 10174402
On vehicles built on or before 20 November 2017, a sticking torque converter clutch valve in the main control. Also lists the Lincoln Navigator. Only the NHTSA flat-file summary was read, not the bulletin itself.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.
Sources and review
- Ford TSB 19-2100: MIL with only P0741 and/or P1744
- Ford TSB 20-2117: 10R80: MIL with P0741 and P1744
- Ford ASI-32271: P0741 and P1744 with no other symptoms
- Cal. Code Regs. Tit. 13, § 1968.2 — Malfunction and Diagnostic System Requirements (OBD II)
- P1744 OBD-II Trouble Code: Torque Converter Clutch System Performance
- Last reviewed
- Written by
- Saurabh K.
- Editorial review
- Pending
- Technician review
- Technician review pending
This page explains what a code usually means; it is not a substitute for a professional inspection. How we source and review · Report an error