Network, generic

U0220 Lost Communication With Door Switch F

Check engine lightUsually off

EmissionsNot relevant

Drive cycleNot required

Limp modeNo

U0220 reports that door switch unit F has stopped communicating. Water is a well-documented enemy of such units. GM recall 14V404 (bulletin 14309) covered 2005–2007 TrailBlazer, Envoy, Rainier and Saab 9-7X: salty melt water reaching the driver-door module corroded its circuit board, so lock and window switches worked only now and then, windows could move by themselves and the board could overheat; dealers fitted a new module. On 2014–2018 GM pickups and SUVs, bulletin 18-NA-079 traces LIN losses of the driver window switch to water at the door-to-body connector X500, using GM's own code U1538. No manufacturer documents U0220 itself; the letter is assigned per make. No MIL.

Likely causes

Water or salt slush inside the switch unit, corroded circuit board

Corrosion at the door-to-body connector

Broken wire in the door harness

Switch unit failed without visible moisture

Symptoms

Window or lock keys work only intermittently
Window moves without a button press
Heat or burnt smell at the door switch panel

Repair estimate

DifficultyMediumDIY possible

Parts and labour€30–450

Time0.5–2.5 h

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

Parts involved

door switch flin bus

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