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U042D Invalid Data Received From Active Vibration Control Module

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

The active vibration control module drives active engine mounts or inertial actuators that push against engine vibration in counter-phase, useful with cylinder deactivation. It needs engine speed and other data from the bus and reports its own status back. U042D says a partner receives its frames but finds them invalid. No manufacturer documents U042D publicly. Honda's patent US 10,360,893 describes such a controller that adapts its cancelling output by adaptive filtering and also reads vehicle speed, blower air volume and window state. Bentley shows it is a separate box: fitting newer mounts on a 2017-2020 Bentayga calls for a new program or a new controller for the active mounts, since the old software does not suit them (2055760/1). U012C is lost contact. Expect more vibration; no MIL.

Likely causes

Control unit software not matching replaced mounts or actuators
Active vibration control module faulty
Low supply voltage or poor connection at the module

Symptoms

  • Noticeable vibration or humming at idle
  • More body vibration when cylinders are deactivated

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€60–1,000
Time0.5–3 h

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

Parts involved

active vibration module

Related codes

U012CP0A14

References: patents.google.com, static.nhtsa.gov.