Network, generic

U049F Invalid Data Received From Transmission Range Control Module

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

The transmission range control module (TRCM) is the shift-by-wire actuator that physically moves the transmission between P, R, N and D after the driver selects a range electronically. U049F is stored by a module that receives TRCM messages whose content it rejects. Ford lists U049F in its 2014 OBD code chart without the MIL marker it gives to other codes such as U04A4. GM fitted a TRCM to the 2017 LaCrosse and XT5: under program 17075 a broken actuator gear left cars stuck in Park, and bulletin 16-NA-373 cured a calibration fault that lit the MIL with a transmission warning by reprogramming. U019E stands for lost contact, U031A for software mismatch, U04BD for the park lock module. Drivers may see a shift warning, a wrong gear display or a car that will not leave Park.

Likely causes

TRCM electronics or actuator position sensing faulty
Outdated TRCM calibration (GM 16-NA-373 calls for reprogramming)
Bus wiring or connector fault at the transmission-mounted module
Low or unstable battery voltage while shifting

Symptoms

  • Shift system or transmission service message
  • Vehicle stays in Park or does not engage the selected range
  • Gear indicator disagrees with the selected range

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€100–1,200
Time0.5–2.5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

transmission range module

Related codes

U019EU031AU04BD

References: performanceparts.ford.com, static.nhtsa.gov, static.nhtsa.gov, en.wikipedia.org.