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BMW D796D8

No message (- 0x91), receiver CCU, transmitter EME Other fault codes below may be stored in the EGS

DriveUnknown. The supplied verified evidence does not establish whether the vehicle can be driven with D796D8.
ChargeUnknown. The supplied verified evidence does not establish whether the vehicle can be charged with D796D8.
ServiceService requirement is unknown in the supplied record. Because the official communication excerpt references drivetrain-failure and total-vehicle-error information, contact a BMW service provider for diagnosis if these warnings are displayed or the code is present.
Confidence97%

Quick answer

D796D8 is a BMW OEM communication fault: the CCU did not receive message 0x91 from the EME. Verified applicability is the 2025 BMW XM in the US.

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 D796D8 mean?

D796D8 is a BMW OEM communication fault: the CCU did not receive message 0x91 from the EME. Verified applicability is the 2025 BMW XM in the US.

2. Technical explanation

The verified description for D796D8 is: “No message (- 0x91), receiver CCU, transmitter EME.” This identifies a missing message between the EME transmitter and CCU receiver. The supplied official NHTSA manufacturer communication also states that other fault codes may be stored in the EGS. The underlying reason for the missing message is not yet established by verified evidence.

3. What system is affected?

CCU receiver and EME transmitter communication. The source also notes that additional fault codes may be stored in the EGS.

4. How serious is this code?

Unknown. The supplied verified evidence does not assign a severity.

5. Symptoms you may notice

  • The official communication excerpt references “Drivetrain failure” and “Information: Total error of vehicle.”
  • No additional symptoms are established by the supplied verified evidence.

6. Possible causes

  • A missing message 0x91 from the EME to the CCU is verified.
  • The cause of the missing message is not yet established by verified evidence.

7. Can I still drive the vehicle?

Unknown. The supplied verified evidence does not establish whether the vehicle can be driven with D796D8.

8. Can I charge the vehicle?

Unknown. The supplied verified evidence does not establish whether the vehicle can be charged with D796D8.

9. What you can safely do

  • Record the exact warning messages displayed and the conditions when they occurred.
  • Arrange diagnosis by a BMW service provider if the fault or drivetrain warnings are present.
  • Do not attempt high-voltage component repair based on this code.

10. Step-by-step troubleshooting

  1. Have a qualified service provider read fault memory in the CCU and EGS.
  2. Check for associated stored faults identified during the diagnostic scan. The official communication states that other fault codes may be stored in the EGS.
  3. Further troubleshooting steps are not yet established by verified evidence.

11. When to contact service

Service requirement is unknown in the supplied record. Because the official communication excerpt references drivetrain-failure and total-vehicle-error information, contact a BMW service provider for diagnosis if these warnings are displayed or the code is present.

12. What the service center may check

  • Read CCU fault memory for D796D8 and related communication faults.
  • Read EGS fault memory because the official communication states other faults may be stored there.
  • The source excerpt identifies possible EGS entries BA09B8 and BA0A45 in addition to the CCU faults, but does not establish that they are always present with D796D8.

13. Possible repair or resolution

  • Not yet established by verified evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • NHTSA Manufacturer Communication 11030054: B610326, published March 5, 2026. The supplied excerpt documents D796D8 as “No message (- 0x91), receiver CCU, transmitter EME” and notes that other fault codes may be stored in the EGS.

16. Recall information

  • No recall information was supplied or established by verified evidence.

17. Official manufacturer information

Verified source: NHTSA Manufacturer Communication 11030054: B610326, published March 5, 2026. https://static.nhtsa.gov/odi/ffdd/tsbs/TSBS_RECEIVED_2025-2026.zip#nhtsa_id=11030054

19. Frequently asked questions

What does BMW code D796D8 mean?

It means the CCU receiver has no message 0x91 from the EME transmitter.

Which vehicle is verified as applicable?

The supplied evidence verifies applicability to the US-market 2025 BMW XM.

Can D796D8 be driven or charged?

Driving and charging status are not yet established by verified evidence.

Are other codes relevant?

Yes. The official communication states that other fault codes may be stored in the EGS.

20. Sources & verification

Verified
BMW D796D8: No message (- 0x91), receiver CCU, transmitter EME Other… | EV Diagnostics