U05A7 code meaning
Invalid Data Received From Safety Integration Control Module
What U05A7 means
The Safety Integration Control Module appears in the SAE code catalogue, yet no carmaker explains in public what this unit does or which models carry it; the name suggests a controller that ties several safety functions together. U05A7 is stored by a receiving module that still gets the unit's frames but refuses what they contain. Safety-related signals are normally secured end to end: the AUTOSAR E2E protocol attaches a CRC to detect altered bits, a counter to spot repeated or reordered frames and a data ID so that a wrong sender is recognised. Failing one of these checks is the typical trigger. No manufacturer documents U05A7 or its partner U02A6, which stands for a module that has gone silent. Expect warnings and reduced assistance, not an emissions fault.
U05A7 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyHard
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U05A7
- Warning message about safety or assistance systems
- Individual assistance functions unavailable
- Further network codes stored in several modules
Common causes of U05A7
- PossibleSoftware fault or outdated software in the safety integration module
- PossibleModule replaced or reprogrammed without matching vehicle configuration
- Less likelyCorrupted frames from wiring, connector or termination faults on the bus
- Less likelyLow supply voltage during start or after battery discharge
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Safety integration module
What each part of U05A7 means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| A7 | The exact fault in that area. |
What to do next
- Note U05A7 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 U05A7
What does U05A7 mean?
U05A7 means "Invalid Data Received From Safety Integration Control Module". The Safety Integration Control Module appears in the SAE code catalogue, yet no carmaker explains in public what this unit does or which models carry it; the name suggests a controller that ties several safety functions together. It is a generic code, so it means the same on every make.
Is it safe to drive with U05A7?
U05A7 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will U05A7 fail an emissions test?
U05A7 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 U05A7 to fix?
Difficulty: hard. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will U05A7 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.