Network, generic

U0516 Invalid Data Received From Door Switch A

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

Here a door switch is a networked switch pack in a door trim panel that reports window, lock or mirror requests as data instead of through separate wires. U0516 is stored when frames from switch unit A arrive but fail the receiver's validity checks. No manufacturer publishes which door letter A stands for or documents this code; FCA lists the driver's switch as unit B, so A cannot simply be taken as the driver's side. NXP's car door keypad note AN2205 illustrates the scheme: the body controller polls the keypad over LIN about every 100 ms and receives a short status reply in which the slave also flags its own bus errors. Requests from a rejected switch are ignored or treated as released, so its buttons seem dead. U0215 is the lost-communication counterpart.

Likely causes

Electronics of switch unit A faulty (moisture, cracked solder joints)
Damaged data or ground wire in the door harness
Replacement switch of the wrong variant or software level

Symptoms

  • Buttons on one door switch pack without function
  • Window or lock on that door only operable from other switches

Repair estimate

DifficultyMediumDIY possible
Parts and labour€0–350
Time0.3–1.5 h

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

Parts involved

door switch a

Related codes

U0215U0517U0518

References: nxp.com, static.nhtsa.gov, en.wikipedia.org.