U02A6 code meaning
Lost Communication With Safety Integration Control Module
What U02A6 means
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.
U02A6 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyWorkshop only
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U02A6
- Several safety or assistance warnings at once
- Driver assistance functions unavailable
Common causes of U02A6
- PossibleFuse, supply or ground of the module faulty
- PossibleBus wiring or connector to the module damaged
- PossibleSoftware or configuration fault after programming
- Less likelySafety integration module internally failed
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Safety integration moduleVehicle bus wiring
What each part of U02A6 means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| A6 | The exact fault in that area. |
What to do next
- Note U02A6 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about U02A6
What does U02A6 mean?
U02A6 means "Lost Communication With Safety Integration Control Module". 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. It is a generic code, so it means the same on every make.
Is it safe to drive with U02A6?
U02A6 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will U02A6 fail an emissions test?
U02A6 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is U02A6 to fix?
Difficulty: workshop only. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will U02A6 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.