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U0560 Invalid Data Received From Electronic Brake Booster Control Module B

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

A second brake booster unit mainly appears in architectures built for automated driving, where a single electronic brake must not be a single point of failure. Bosch, for example, pairs its integrated power brake with a separate redundant brake unit that can stop the car if the primary unit fails. U0560 reports that the module labelled B sends data the receiver cannot use, for instance a status that contradicts the A unit or a frame with a wrong counter or checksum. No manufacturer documents U0560 publicly, and which physical unit carries the B label depends on the maker. U025F is the lost-communication counterpart. Losing redundancy usually triggers a warning and can disable assisted or automated driving functions.

Likely causes

Secondary brake unit B internally faulty
Software of the two brake units not matched after update or replacement
Separate supply or ground of unit B faulty

Symptoms

  • Brake system warning lamp or message on
  • Driver assistance or automated functions unavailable

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€100–2,000
Time0.5–3 h

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

Parts involved

electronic brake booster module b

Related codes

U025FU055FU0415

References: bosch-mobility.com, bosch-mobility.com.