Chevrolet U1651
Lost Communication with Audio Amplifier on CAN Bus 5 will be present. Cause Software anomaly in the amplifier Subject: Page 2 January, 20
Quick answer
For applicable 2024–2026 Chevrolet Equinox vehicles in the US, DTC U1651 is documented in an official manufacturer communication as “Lost Communication with Audio Amplifier on CAN Bus 5.” The verified communication attributes the condition to a software anomaly in the amplifier.
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 U1651 mean?
For applicable 2024–2026 Chevrolet Equinox vehicles in the US, DTC U1651 is documented in an official manufacturer communication as “Lost Communication with Audio Amplifier on CAN Bus 5.” The verified communication attributes the condition to a software anomaly in the amplifier.
2. Technical explanation
Verified evidence identifies U1651 as a lost-communication diagnostic trouble code for the audio amplifier on CAN Bus 5. The manufacturer communication states that the cause is a software anomaly in the amplifier.
3. What system is affected?
Audio system / audio amplifier communication on CAN Bus 5.
4. How serious is this code?
Not yet established by verified evidence.
5. Symptoms you may notice
- No audio or no sound from the speakers may be reported.
- DTC U1651 may be present when the condition is inspected.
6. Possible causes
- Software anomaly in the audio amplifier.
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 a Chevrolet dealer or qualified service facility if there is no audio and U1651 is present.
- Do not attempt high-voltage repairs; the verified evidence concerns the audio amplifier communication condition and does not establish any high-voltage repair procedure.
10. Step-by-step troubleshooting
- Confirm whether there is no audio or no sound from the speakers.
- Have a service facility inspect for DTC U1651.
- Use the applicable manufacturer communication as part of the diagnostic process.
11. When to contact service
Service need is not explicitly established by the supplied evidence. However, a Chevrolet dealer or qualified service facility can inspect a no-audio condition and confirm whether U1651 is present.
12. What the service center may check
- Inspect for DTC U1651.
- Assess the reported no-audio/no-speaker-sound condition.
- Refer to manufacturer communication PIT6471 for the documented condition and amplifier software-anomaly cause.
13. Possible repair or resolution
- Not yet established by verified evidence.
14. Affected vehicles
- Chevrolet Equinox · 2024–2026 · US
15. Related TSBs / service bulletins
- PIT6471, published January 15, 2026, is an official manufacturer communication available through NHTSA. It documents no audio or no sound from the speakers, U1651, and a software anomaly in the amplifier.
- NHTSA Manufacturer Communication PDF 11027691: PIT6471 — https://static.nhtsa.gov/odi/tsbs/2026/MC-11027691-0001.pdf
- NHTSA Manufacturer Communication PDF 11027702: PIT6471 — https://static.nhtsa.gov/odi/tsbs/2026/MC-11027702-0001.pdf
16. Recall information
- Not yet established by verified evidence.
17. Official manufacturer information
Applicable verified vehicle coverage: Chevrolet Equinox, model years 2024–2026, United States. The supplied official NHTSA-hosted manufacturer communications were published January 15, 2026 and identify PIT6471.
19. Frequently asked questions
What does Chevrolet U1651 mean?
Verified evidence identifies U1651 as “Lost Communication with Audio Amplifier on CAN Bus 5.”
What symptoms are documented with U1651?
The official manufacturer communication says some customers may report no audio or no sound from the speakers.
What cause is documented for U1651?
The communication identifies a software anomaly in the amplifier.
Does the evidence say whether the vehicle can be driven or charged?
No. Driveability and charging safety are not yet established by verified evidence.
Which vehicles are covered by the supplied evidence?
The supplied applicability evidence covers US-market 2024–2026 Chevrolet Equinox vehicles.