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Jeep B1A11

00 are set, along with no low FOB battery messages complaints by the owner, it is unlikely that a FOB battery requires a replacement, a FOB

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceContact an authorized Jeep dealer or qualified service facility if B1A11-00 is active or a low FOB battery message is displayed. The supplied evidence does not establish whether immediate service is required.
Confidence95%

Quick answer

B1A11-00 is identified in verified Jeep manufacturer communications as “RKE FOB 2 Battery Low.”

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 B1A11 mean?

B1A11-00 is identified in verified Jeep manufacturer communications as “RKE FOB 2 Battery Low.”

2. Technical explanation

Verified NHTSA-posted Jeep manufacturer communications list B1A11-00 as an active Radio Frequency Hub (RFH) diagnostic trouble code for Remote Keyless Entry (RKE) FOB 2 battery low. A separate Jeep communication states that when neither B1A10-00 nor B1A11-00 is set and there are no low-FOB-battery cluster messages, a key-fob battery replacement is unlikely to be required. This supports the relevance of the code to an RKE FOB 2 low-battery indication, but does not establish a vehicle-specific root cause or repair from the supplied evidence.

3. What system is affected?

Remote Keyless Entry (RKE) / Radio Frequency Hub (RFH), specifically FOB 2 battery-status monitoring.

4. How serious is this code?

Not yet established by verified evidence.

5. Symptoms you may notice

  • A low FOB battery message on the instrument cluster is referenced in verified Jeep manufacturer communications.
  • Other customer symptoms associated with B1A11-00 are not fully established by the supplied evidence.

6. Possible causes

  • The verified evidence identifies B1A11-00 as “RKE FOB 2 Battery Low.”
  • A specific underlying cause beyond the reported low-battery condition 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

  • Confirm whether the vehicle displays a low FOB battery message.
  • Have an authorized Jeep dealer or qualified service facility read active and stored codes, including RFH codes.
  • Use the vehicle-specific service information and applicable manufacturer communication to determine next steps.

10. Step-by-step troubleshooting

  1. Verify whether B1A11-00 is active in the Radio Frequency Hub (RFH).
  2. Check whether a low FOB battery message is present on the cluster, as referenced by the manufacturer communication.
  3. Determine whether the vehicle is covered by an applicable Jeep manufacturer communication based on its exact model, model year, market, and configuration.
  4. Further diagnostic steps are not established by the supplied verified evidence.

11. When to contact service

Contact an authorized Jeep dealer or qualified service facility if B1A11-00 is active or a low FOB battery message is displayed. The supplied evidence does not establish whether immediate service is required.

12. What the service center may check

  • Scan the Radio Frequency Hub (RFH) for active B1A11-00 and other stored DTCs.
  • Confirm whether B1A10-00, B1A11-00, or B23D7-14 is present where applicable to the referenced Jeep communications.
  • Check for low-FOB-battery cluster messages.
  • Review applicable software updates where directed by the relevant Jeep manufacturer communication.

13. Possible repair or resolution

  • The supplied evidence does not establish a universal repair for B1A11-00.
  • A Jeep communication states that if B1A10-00 and B1A11-00 are not set and there are no low-FOB-battery messages, FOB battery replacement is unlikely to be needed.
  • Whether a FOB battery replacement, software update, or another correction applies when B1A11-00 is active is not fully established by the supplied evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • Jeep/NHTSA Manufacturer Communication 08-213-24, published October 1, 2024 (NHTSA ID 11008743), lists B1A11-00 as RKE FOB 2 Battery Low.
  • Jeep/NHTSA Manufacturer Communication 08-213-24 REV. A, published December 14, 2024 (NHTSA ID 11011928), lists B1A11-00 as RKE FOB 2 Battery Low.
  • Jeep/NHTSA Manufacturer Communication 08-090-25, published April 1, 2025 (NHTSA ID 11016857), lists B1A11-00 as RKE FOB 2 Battery Low.
  • Jeep/NHTSA Manufacturer Communication 08-091-25, published April 1, 2025 (NHTSA ID 11016858), lists B1A11-00 as RKE FOB 2 Battery Low.
  • Jeep/NHTSA Manufacturer Communication 08-091-25 REV. A, published May 21, 2025 (NHTSA ID 11018677), lists B1A11-00 as RKE FOB 2 Battery Low.
  • Jeep/NHTSA Manufacturer Communication S2408000118 REV. B, published August 1, 2025 (NHTSA ID 11021577), states that without B1A10-00/B1A11-00 and without low-FOB-battery messages, a FOB battery replacement is unlikely to be required.
  • Jeep/NHTSA Manufacturer Communication S2408000118 REV. C, published August 23, 2025 (NHTSA ID 11022190), contains the same general note regarding absence of B1A10-00/B1A11-00 and low-FOB-battery messages.
  • Jeep/NHTSA Manufacturer Communication 08-091-25 REV. B, published November 14, 2025 (NHTSA ID 11025626), lists B1A11-00 as RKE FOB 2 Battery Low.
  • Jeep/NHTSA Manufacturer Communication S2608000010, published March 5, 2026 (NHTSA ID 11030042), identifies B1A11-00 as one of several active RFH DTCs.

16. Recall information

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

17. Official manufacturer information

Verified sources are NHTSA-posted Jeep manufacturer communications. Applicability supplied with this diagnostic includes certain U.S. Jeep Grand Cherokee model years 2021–2026, Wagoneer model years 2021–2026, and Wrangler model years 2021–2026; overlapping entries are present in the supplied data. Exact bulletin applicability must be confirmed by vehicle configuration and the manufacturer’s service information.

19. Frequently asked questions

What does Jeep code B1A11-00 mean?

Verified Jeep manufacturer communications identify B1A11-00 as “RKE FOB 2 Battery Low.”

Does B1A11-00 mean the key-fob battery definitely needs replacement?

Not conclusively from the supplied evidence. The evidence states that when B1A10-00 and B1A11-00 are absent and there are no low-FOB-battery messages, replacement is unlikely to be required. It does not establish a universal repair when B1A11-00 is active.

Is B1A11-00 related to an EV high-voltage battery?

No such connection is established by the supplied evidence. The verified communications identify it with RKE FOB 2 battery status and the Radio Frequency Hub.

Can I drive or charge with B1A11-00?

Not yet established by verified evidence.

20. Sources & verification

Verified
Jeep B1A11: 00 are set, along with no low FOB battery messages… | EV Diagnostics