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Dodge B18AA

Trunk/Gate Unlock Control 1-Circuit Short to Ground. NOTE: There are no Malfunction Indicator Lamp (MIL) illumination or related messa

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceContact an authorized Dodge service center for diagnosis and to determine whether the applicable BCM software update should be performed.
Confidence95%

Quick answer

For certain 2026 Dodge Charger vehicles in the US, DTC B18AA-11 is identified in official manufacturer communications as “Trunk/Gate Unlock Control 1—Circuit Short to Ground.” The documented service action is a Body Control Module (BCM) software update.

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 B18AA mean?

For certain 2026 Dodge Charger vehicles in the US, DTC B18AA-11 is identified in official manufacturer communications as “Trunk/Gate Unlock Control 1—Circuit Short to Ground.” The documented service action is a Body Control Module (BCM) software update.

2. Technical explanation

Verified NHTSA-posted Dodge manufacturer communications state that technicians may find B18AA-11 and describe it as a trunk/gate unlock control 1 circuit short to ground. The communications identify a BCM update/reprogramming with the latest available software as the bulletin action. They also state that there is no MIL illumination or related message in the Instrument Panel Cluster for this condition.

3. What system is affected?

Body Control Module (BCM) and the trunk/gate unlock control 1 circuit.

4. How serious is this code?

Not yet established by verified evidence.

5. Symptoms you may notice

  • B18AA-11 may be stored as a diagnostic trouble code.
  • Official bulletin evidence states there is no MIL illumination or related Instrument Panel Cluster message for this condition.

6. Possible causes

  • The official communications document a BCM software update as the service action.
  • A physical wiring fault, component fault, or other root cause is not yet established by verified evidence.

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

  • Arrange diagnosis with an authorized Dodge service center and provide DTC B18AA-11.
  • Check whether the vehicle is within the documented applicability: 2026 Dodge Charger, US.
  • Do not attempt BCM programming or electrical circuit repair without appropriate service equipment and procedures.

10. Step-by-step troubleshooting

  1. Have a qualified technician confirm the stored DTC and applicable BCM software level.
  2. Have the technician review the applicable BCM update instructions in the official Dodge communications.

11. When to contact service

Contact an authorized Dodge service center for diagnosis and to determine whether the applicable BCM software update should be performed.

12. What the service center may check

  • Confirm DTC B18AA-11 is present.
  • Confirm vehicle applicability for the relevant Dodge BCM update bulletin.
  • Check the BCM software level and perform the applicable official update procedure.

13. Possible repair or resolution

  • Official TSB evidence identifies reprogramming/updating the BCM with the latest available software as the service action.
  • Whether this resolves every instance of B18AA-11 is not yet established by verified evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • NHTSA Manufacturer Communication 11029669, 08-074-26, published February 20, 2026: documents B18AA-11 and states the bulletin involves reprogramming the BCM with the latest available software.
  • NHTSA Manufacturer Communication 11031661, 08-074-26 REV. A, published April 25, 2026: BCM update communication listing B18AA-11.
  • NHTSA Manufacturer Communication 11036351, 08-175-26 REV. A, published August 19, 2026: BCM update communication listing B18AA-11.

16. Recall information

  • No recall information was supplied in the verified evidence.

17. Official manufacturer information

Official NHTSA-posted manufacturer communications: https://static.nhtsa.gov/odi/ffdd/tsbs/TSBS_RECEIVED_2025-2026.zip#nhtsa_id=11029669 ; https://static.nhtsa.gov/odi/ffdd/tsbs/TSBS_RECEIVED_2025-2026.zip#nhtsa_id=11031661 ; https://static.nhtsa.gov/odi/ffdd/tsbs/TSBS_RECEIVED_2025-2026.zip#nhtsa_id=11036351

19. Frequently asked questions

What does B18AA-11 mean?

Official Dodge communications describe B18AA-11 as “Trunk/Gate Unlock Control 1—Circuit Short to Ground.”

Will the check-engine light or an instrument-cluster message appear?

The supplied official bulletin evidence states there is no MIL illumination or related Instrument Panel Cluster message for this condition.

What is the documented repair action?

The official communications identify a BCM software update or reprogramming with the latest available software.

Which vehicles are supported by the supplied applicability evidence?

The supplied evidence applies to the 2026 Dodge Charger in the US.

Is the vehicle safe to drive or charge?

Not yet established by verified evidence.

20. Sources & verification

Verified
Dodge B18AA: Trunk/Gate Unlock Control 1-Circuit Short to Ground.… | EV Diagnostics