Network, generic

U0157 Lost Communication With Information Center B

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

U0157 is set when the second information display, Information Center B, stops transmitting on the vehicle bus. J2012 provides two such driver information displays, A (U0156) and B, separate from the instrument cluster (U0155) and the head-up display (U0158); which screen counts as B is up to the manufacturer. The setting logic is the generic one GM documents for U0100-U02FF: a monitored periodic message is missing while the supply sits between 9 and 16 V, and every module waiting for it logs the code. No manufacturer documents U0157 publicly; GM's list carries only U0155 and U0158. The display stays dark or frozen, the rest of the car is mostly unaffected, and no MIL comes on.

Likely causes

Display unit B without power or ground (fuse, connector)
Bus line or connector behind the dashboard damaged
Display software hang or failed update
Information Center B internally faulty

Symptoms

  • Secondary display dark, frozen or showing no data
  • Messages normally shown on display B missing
  • Code stored in several modules

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€60–900
Time0.5–3 h

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

Parts involved

information display modulecan bus wiring

Related codes

U0155U0156U0158

References: saabwisonline.com, saabwisonline.com, en.wikipedia.org.