U0573 code meaning
Invalid Data Received From Vehicle Motion Control Module B
What U0573 means
U0573 is the B variant: invalid data from a second vehicle motion control module. A second unit makes sense where coordination tasks are split, for example lateral and longitudinal motion, or where a backup must take over for automated driving. Hitachi Astemo's patent explains why timing matters in such systems: actuator modules receive their instructions over a shared network that also carries other traffic, so each instruction refers to a common time frame. Data from B that arrive outside that frame, with stale counters or with values contradicting module A are rejected and stored as U0573. No manufacturer documents the code publicly, and no lost-communication code exists for this module. Coordinated functions are then reduced.
U0573 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U0573
- Warning about reduced chassis or assistance functions
- Automated or semi-automated driving functions unavailable
Common causes of U0573
- Most likelyLost time synchronisation between module B and the actuator controllers
- PossibleModules A and B on different software levels
- Less likelyMotion control module B internally faulty
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Vehicle motion control module b
What each part of U0573 means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 73 | The exact fault in that area. |
What to do next
- Note U0573 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 U0573
What does U0573 mean?
U0573 means "Invalid Data Received From Vehicle Motion Control Module B". U0573 is the B variant: invalid data from a second vehicle motion control module. It is a generic code, so it means the same on every make.
Is it safe to drive with U0573?
Drive gently and only to a workshop. With U0573 the car can go into limp mode (reduced power) to protect itself.
Will U0573 fail an emissions test?
U0573 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 U0573 to fix?
Difficulty: workshop only. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will U0573 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.