U0210 code meaning
Lost Communication With Seat Control Module C
What U0210 means
U0210 flags lost contact with seat control module C. GM fills the slot in two ways: the 2011 Saab 9-5 list assigns it to the rear seat heating module, while bulletin 23-NA-206 and its predecessor PIT5762F (2020–2023 Escalade, Tahoe, Suburban, Yukon, Corvette, CT4, CT5) name the passenger front seat bladder control module, i.e. the air cells for lumbar support or massage. There U0210 is one of many history codes caused by software anomalies; they set no MIL or message and are simply ignored, whereas a current U0210 is diagnosed as usual. A real dropout shows as dead rear seat heaters or a passenger lumbar or massage function that no longer reacts. No MIL.
U0210 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.2 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U0210
- Rear seat heating inoperative
- Passenger lumbar support or massage does not react
- Code stored only in history without any complaint
Common causes of U0210
- Most likelyHistory entry from a software anomaly (GM 2020–2023, ignore if not current)
- PossibleSeat harness unplugged or pinched
- PossibleFuse or supply of the seat module
- Less likelySeat module C faulty
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Seat module cCAN bus
What each part of U0210 means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 10 | The exact fault in that area. |
What to do next
- Note U0210 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 U0210
What does U0210 mean?
U0210 means "Lost Communication With Seat Control Module C". U0210 flags lost contact with seat control module C. It is a generic code, so it means the same on every make.
Is it safe to drive with U0210?
U0210 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will U0210 fail an emissions test?
U0210 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 U0210 to fix?
Difficulty: medium. A typical repair takes 0.2 to 3 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will U0210 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.