Network, generic

U02A6 Lost Communication With Safety Integration Control Module

Check engine lightUsually off

EmissionsNot relevant

Drive cycleNot required

Limp modeNo

The Safety Integration Control Module is a name from the SAE code catalogue for which no carmaker publishes a role or a fitted model; the term points to a unit that bundles several safety functions, for instance restraint, braking and driver assistance data. U02A6 means another controller expects its cyclic messages and they no longer come. For safety signals that check is normally formalised: the AUTOSAR end-to-end protocol has the receiver watch the arrival of fresh data and declare a timeout once too many cycles pass without a valid new frame, alongside CRC and counter checks. ISO 26262 then requires a safe state for such faults. No manufacturer documents U02A6 or its partner U05A7 publicly. Typical results are warnings and switched-off assistance features, without an emissions link.

Likely causes

Fuse, supply or ground of the module faulty

Bus wiring or connector to the module damaged

Software or configuration fault after programming

Safety integration module internally failed

Symptoms

Several safety or assistance warnings at once
Driver assistance functions unavailable

Repair estimate

DifficultyShop_onlyWorkshop job

Parts and labour€50–1,500

Time0.5–3 h

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

Parts involved

safety integration modulevehicle bus wiring

Related codes

U05A7

References: autosar.org, en.wikipedia.org.