Network, generic

U0211 Lost Communication With Seat Control Module D

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

U0211 reports that seat control module D is absent from the bus. GM bulletin 21-NA-131, which replaces PIT5796A (2020–2021 Escalade, Tahoe, Suburban, Yukon and 2021 Corvette, CT4, CT5), names it the memory seat module: the driver assistance controller EOCM records U0211 and invalid data U0512 when software in the memory seat module misbehaves. Auto entry and exit or memory recall then fail, the backrest stops short of full recline, and Super Cruise may drop out with a service message. Reprogramming the driver seat memory module is the cure. Honda bulletin 25-051 (2024 Prologue) removes the same code with new software for the radio control module A11. No MIL.

Likely causes

Memory seat module software (GM 21-NA-131, reprogram)
Radio control module software (Honda Prologue 25-051)
Seat harness or connector under the driver seat

Symptoms

  • Seat memory and easy entry/exit inoperative
  • Backrest will not recline fully
  • Driver assistance message or Super Cruise unavailable

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€0–300
Time0.3–1.5 h

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

Parts involved

seat module dcan bus

Related codes

U0210U0208U0512U0247

References: static.nhtsa.gov, static.nhtsa.gov.