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Audi C102029

Yaw rate 1 implausible signal

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceContact an Audi service provider if the ESC warning light or multiple cluster warnings are present, or if C102029 remains stored after evaluation.
Confidence95%

Quick answer

For certain 2019–2020 Audi e-tron vehicles in the US, DTC C102029 means “Yaw rate 1 implausible signal.” Audi/NHTSA documentation identifies a known condition in which this code can be stored in the ABS control module during vehicle sleep-mode transition if the vehicle bus is awakened, such as by opening a door or connecting the charger.

This page separates verified manufacturer/regulator evidence from supporting material. Unsupported causes, repairs or safety conclusions are not guessed.

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1. What does C102029 mean?

For certain 2019–2020 Audi e-tron vehicles in the US, DTC C102029 means “Yaw rate 1 implausible signal.” Audi/NHTSA documentation identifies a known condition in which this code can be stored in the ABS control module during vehicle sleep-mode transition if the vehicle bus is awakened, such as by opening a door or connecting the charger.

2. Technical explanation

The verified manufacturer communication states that, while the vehicle is entering sleep mode, there is a small time window in which waking the bus can mistakenly set DTC C102029 in the ABS control module (J104, address word 0003). The communication gives examples of bus wake-up events: opening a door or connecting the charger. The same event can cause the ESC warning light to illuminate.

3. What system is affected?

ABS control module J104 (address word 0003); ESC warning indication.

4. How serious is this code?

Not yet established by verified evidence.

5. Symptoms you may notice

  • Multiple warning lights in the instrument cluster.
  • ESC warning light illuminated.
  • DTC C102029 stored in the ABS control module.

6. Possible causes

  • During entry into sleep mode, the vehicle bus is awakened within a small timing window, for example by opening a door or connecting the charger. The manufacturer communication states that this can mistakenly cause C102029 to be stored.

7. Can I still drive the vehicle?

Not yet established by verified evidence.

8. Can I charge the vehicle?

Not yet established by verified evidence.

9. What you can safely do

  • If the ESC warning light or multiple warning lights are present, arrange diagnostic evaluation by an Audi service provider.
  • Record when the warning appeared, including whether a door was opened or the charger was connected while the vehicle was entering sleep mode.
  • Do not attempt high-voltage or ABS control-module repairs yourself.

10. Step-by-step troubleshooting

  1. Confirm whether C102029 is stored in ABS control module J104 (address word 0003).
  2. Review whether the vehicle was entering sleep mode when the bus was awakened, including by door opening or charger connection.
  3. Not yet established by verified evidence whether additional diagnostic steps are needed for this code outside the documented sleep-mode condition.

11. When to contact service

Contact an Audi service provider if the ESC warning light or multiple cluster warnings are present, or if C102029 remains stored after evaluation.

12. What the service center may check

  • Scan ABS control module J104 (address word 0003) for C102029.
  • Check for the other DTCs listed in the manufacturer communication: C051F00, C052000, C102229, and U015100.
  • Assess whether the documented sleep-mode/bus-wake condition occurred.

13. Possible repair or resolution

  • Not yet established by verified evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • NHTSA Manufacturer Communication PDF 10163426, published July 26, 2019: Audi communication A4519132055702_1. It documents that C102029 may be mistakenly stored in ABS control module J104 when the bus is awakened during a small sleep-mode transition window, with the ESC warning light illuminated.

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Verified official source: NHTSA Manufacturer Communication PDF 10163426, Audi communication A4519132055702_1, published July 26, 2019: https://static.nhtsa.gov/odi/tsbs/2019/MC-10163426-0001.pdf

19. Frequently asked questions

What does Audi code C102029 mean?

It means “Yaw rate 1 implausible signal.”

Which vehicles are covered by the verified applicability evidence?

Audi e-tron, model years 2019–2020, US region.

Can connecting the charger be related to C102029?

Yes. The verified manufacturer communication states that connecting the charger can wake the bus during a small sleep-mode transition window and mistakenly cause this DTC to be stored.

Does C102029 illuminate the ESC warning light?

The verified communication states that the documented sleep-mode/bus-wake condition can cause C102029 in the ABS control module and the ESC warning light to come on.

Is it safe to drive or charge with C102029?

Not yet established by verified evidence.

20. Sources & verification

Verified
Audi C102029: Yaw rate 1 implausible signal | EV Diagnostics