Network, generic

U0228 Lost Communication With Door Window Motor G

Check engine lightUsually off

EmissionsNot relevant

Drive cycleNot required

Limp modeNo

U0228 concerns door window motor G, the last letter of this group. No manufacturer documents U0228 publicly. GM shows that a networked window motor does not automatically mean these generic codes: in the 2011 Saab 9-5 the body control module runs the front passenger and driver motors as devices 0 and 4 on LIN bus 3 and the two rear motors on LIN bus 4, and flags a lost motor with GM's own U1530, U1534, U1540 or U1544. Some motors do without Hall sensors; a Gentherm patent derives speed and pinch events from the current ripple, which still calls for electronics at the motor and thus a bus node. Which door carries G is up to the maker. No MIL.

Likely causes

Broken bus or supply wire in the door harness

Corroded or loose motor connector

Electronics of window motor G failed

Symptoms

Window in the affected door does not move
Pinch protection and one-touch operation unavailable

Repair estimate

DifficultyMediumDIY possible

Parts and labour€30–650

Time0.5–3 h

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

Parts involved

door window motor glin bus

References: saabwisonline.com, patents.google.com.