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U0541 Invalid Data Received From Entrapment Control Module B

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

Entrapment control module B is the second slot for a separate pinch-protection unit. Some designs detect a person before contact: a capacitive strip changes its electric field as a hand approaches, and the attached electronics pass the result to the closure controller either as a switched output or as LIN or SAE J2602 data, as a review of tailgate anti-pinch approaches explains; patent US20030151382 likewise combines a capacitive field with a position sensor. U0541 is stored when frames from such a unit B are malformed or implausible. No manufacturer publishes the code. FCA's case S2208000106 shows how confusing two-sided sensing can be: its left and right liftgate pinch sensor codes may point to the wrong side, so check both connectors. U0240 covers complete loss of module B.

Likely causes

Capacitive sensor strip or its electronics delivering implausible values
Sensor connector not fully seated or corroded
Software or calibration of module B not matching after replacement

Symptoms

  • Power liftgate or sliding door stops or reverses without contact
  • Automatic closing refused with a warning

Repair estimate

DifficultyHardWorkshop job
Parts and labour€0–700
Time0.5–3 h

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

Parts involved

entrapment module b

Related codes

U0240U053AU0531

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