Cadillac B1A05
Follow SI 6656059 for this condition. If SI directs replacement of B174W
Quick answer
For a 2024–2025 Cadillac LYRIQ in the US, active DTC B1A05 reported by the B174W Front View Camera module is addressed by following GM Service Information (SI) 6656059. The supplied evidence does not establish the underlying fault, repair outcome, driving safety, or charging safety.
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 B1A05 mean?
For a 2024–2025 Cadillac LYRIQ in the US, active DTC B1A05 reported by the B174W Front View Camera module is addressed by following GM Service Information (SI) 6656059. The supplied evidence does not establish the underlying fault, repair outcome, driving safety, or charging safety.
2. Technical explanation
NHTSA-hosted GM manufacturer communications PIT6503D and PIT6503E instruct technicians to check whether B1A05 is active in the B174W Front View Camera module. If it is active, the instruction is to follow SI 6656059 for the condition. The bulletin excerpt further states: “If SI directs replacement of B174W,” but the supplied evidence does not include the remainder of that instruction or establish that module replacement is required in every case.
3. What system is affected?
B174W Front View Camera module. A broader system name is not established by verified evidence.
4. How serious is this code?
Unknown. The diagnostic record lists severity as unknown.
5. Symptoms you may notice
- Not yet established by verified evidence.
6. Possible causes
- Not yet established by verified evidence.
7. Can I still drive the vehicle?
Unknown. The diagnostic record lists safe-to-drive status as unknown.
8. Can I charge the vehicle?
Unknown. The diagnostic record lists safe-to-charge status as unknown.
9. What you can safely do
- Have the vehicle evaluated by a Cadillac/GM-qualified service facility using the applicable GM Service Information procedure.
- Provide the technician with DTC B1A05 and note whether it is active in the B174W Front View Camera module.
10. Step-by-step troubleshooting
- Confirm whether DTC B1A05 is set as Active by the B174W Front View Camera module.
- If B1A05 is active, follow GM SI 6656059, as directed by PIT6503D and PIT6503E.
- Further diagnostic steps are not established by the supplied verified evidence.
11. When to contact service
Service is recommended for an active B1A05 because the official manufacturer communications direct technicians to GM SI 6656059. Whether service is required in other circumstances is not established by verified evidence.
12. What the service center may check
- Check whether B1A05 is active in the B174W Front View Camera module.
- Follow GM SI 6656059 when B1A05 is active.
- The complete SI 6656059 procedure is not included in the supplied evidence.
13. Possible repair or resolution
- Not yet established by verified evidence.
- The bulletin excerpt indicates that SI 6656059 may direct replacement of B174W, but does not establish when replacement is required or what other repair actions may apply.
14. Affected vehicles
- Cadillac LYRIQ · 2024–2025 · US
15. Related TSBs / service bulletins
- PIT6503E, NHTSA Manufacturer Communication PDF 11036709, published August 27, 2026: for active B1A05 in B174W, follow SI 6656059. https://static.nhtsa.gov/odi/tsbs/2026/MC-11036709-0001.pdf
- PIT6503D, NHTSA Manufacturer Communication PDF 11036400, published August 21, 2026: for active B1A05 in B174W, follow SI 6656059. https://static.nhtsa.gov/odi/tsbs/2026/MC-11036400-0001.pdf
16. Recall information
- Not yet established by verified evidence.
17. Official manufacturer information
Verified applicability: Cadillac LYRIQ, model years 2024–2025, US. Official NHTSA-hosted manufacturer communications identify the B174W Front View Camera module and direct use of GM SI 6656059 when B1A05 is active.
19. Frequently asked questions
What does B1A05 mean on a Cadillac LYRIQ?
The supplied diagnostic record defines it as: “Follow SI 6656059 for this condition. If SI directs replacement of B174W.” The evidence identifies B174W as the Front View Camera module.
Does B1A05 mean the front view camera module must be replaced?
Not necessarily. The supplied bulletin excerpt says to follow SI 6656059 and notes “If SI directs replacement of B174W.” It does not establish that replacement is required for every B1A05 occurrence.
Can I drive with B1A05?
Not yet established by verified evidence. The diagnostic record marks safe-to-drive status as unknown.
Can I charge with B1A05?
Not yet established by verified evidence. The diagnostic record marks safe-to-charge status as unknown.