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Chevrolet U1616

Created On 12/12/2025 - Updated Labor Time 01/12/2026 - Updated DTC list

DriveUnknown. The supplied diagnostic record lists safe-to-drive status as unknown.
ChargeUnknown. The supplied diagnostic record lists safe-to-charge status as unknown.
ServiceContact a Chevrolet dealer or qualified Chevrolet service provider, particularly if U1616 is Active after DTCs are cleared and rechecked. Chevrolet’s cited diagnostic path is SI 6535777.
Confidence95%

Quick answer

U1616 is listed in Chevrolet manufacturer communications for certain 2023–2026 U.S. EV models. The supplied evidence does not establish a plain-language definition, vehicle symptoms, driving/charging safety, or a specific root cause. If U1616 remains Active after clearing and rechecking DTCs, Chevrolet’s referenced diagnostic direction is SI 6535777.

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 U1616 mean?

U1616 is listed in Chevrolet manufacturer communications for certain 2023–2026 U.S. EV models. The supplied evidence does not establish a plain-language definition, vehicle symptoms, driving/charging safety, or a specific root cause. If U1616 remains Active after clearing and rechecking DTCs, Chevrolet’s referenced diagnostic direction is SI 6535777.

2. Technical explanation

The supplied verified evidence identifies U1616 as a DTC referenced in Chevrolet communications PIT6503D and PIT6503E. Those communications instruct technicians to clear DTCs and recheck them. If U1615 or U1616 remains Active, the instruction is to follow SI 6535776 for U1615 or SI 6535777 for U1616. The database title/meaning text is revision-history wording and does not establish the technical definition of U1616.

3. What system is affected?

Not yet established by verified evidence.

4. How serious is this code?

Unknown. The supplied 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 supplied diagnostic record lists safe-to-drive status as unknown.

8. Can I charge the vehicle?

Unknown. The supplied diagnostic record lists safe-to-charge status as unknown.

9. What you can safely do

  • Record whether U1616 is reported as Active and retain a full diagnostic scan report.
  • Arrange Chevrolet service or diagnosis using the applicable service information.
  • Do not infer that the code is harmless, because driving and charging status are not established by the supplied evidence.

10. Step-by-step troubleshooting

  1. Chevrolet communication PIT6503D/PIT6503E directs technicians to clear DTCs and recheck them.
  2. If U1616 remains Active after the clear-and-recheck step, follow SI 6535777 to diagnose U1616.
  3. The supplied excerpt also references a subsequent check for active B1A05 in the B174W Front View Camera module when U1615/U1616 do not remain Active; it does not provide the complete procedure or establish that B1A05 causes U1616.

11. When to contact service

Contact a Chevrolet dealer or qualified Chevrolet service provider, particularly if U1616 is Active after DTCs are cleared and rechecked. Chevrolet’s cited diagnostic path is SI 6535777.

12. What the service center may check

  • Confirm whether U1616 is Active after clearing and rechecking DTCs.
  • If Active, use Chevrolet SI 6535777 for U1616 diagnosis.
  • If U1616 is not Active, PIT6503D/PIT6503E references checking whether B1A05 is Active in the B174W Front View Camera module; further actions are not fully established by the supplied excerpt.

13. Possible repair or resolution

  • Not yet established by verified evidence. The supplied materials reference Chevrolet SI 6535777 but do not provide its repair outcome.

14. Affected vehicles

15. Related TSBs / service bulletins

  • PIT6503E, NHTSA Manufacturer Communication PDF 11036709, published August 27, 2026. It directs use of SI 6535777 when U1616 remains Active after clearing and rechecking DTCs.
  • PIT6503D, NHTSA Manufacturer Communication PDF 11036400, published August 21, 2026. It contains the same cited U1616 diagnostic direction in the supplied evidence.
  • PIT6457B, NHTSA Manufacturer Communication PDF 11027686, published January 12, 2026. The supplied evidence lists U1616 among additional keywords and identifies revision history, but does not establish a U1616 definition or repair.

16. Recall information

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

17. Official manufacturer information

Official NHTSA-hosted Chevrolet manufacturer communications: PIT6503E (MC-11036709-0001.pdf), PIT6503D (MC-11036400-0001.pdf), and PIT6457B (MC-11027686-0001.pdf).

19. Frequently asked questions

What does U1616 mean?

Not yet established by verified evidence. The supplied canonical meaning is revision-history text, not a technical DTC definition.

What should happen if U1616 stays Active after codes are cleared?

The supplied Chevrolet communication directs technicians to follow SI 6535777 for U1616 diagnosis.

Can I drive or charge with U1616?

Not yet established by verified evidence. Both safe-to-drive and safe-to-charge statuses are recorded as unknown.

20. Sources & verification

Verified
Chevrolet U1616: Created On 12/12/2025 - Updated Labor Time 01/12/2026… | EV Diagnostics