EV Diagnostics
Verified EV diagnostic knowledge page

Chevrolet U2107

Cannot relearn TPM • Specific to Hybrids: – Reduced propulsion power message. – Service high voltage charging system message. Cause If nothing else can be identified as the root ca

DriveNot yet established by verified evidence. If reduced propulsion power, a “Service high voltage charging system” message, or erratic electric power-steering boost is present, seek prompt professional evaluation.
ChargeNot yet established by verified evidence. The supplied official communication lists a “Service high voltage charging system” message for hybrids but does not provide charging-operability or charging-safety instructions.
ServiceContact a Chevrolet dealer or qualified service provider promptly, particularly if the vehicle displays reduced propulsion power, “Service high voltage charging system,” or has erratic electric power-steering boost.
Confidence95%

Quick answer

For Chevrolet vehicles represented by the supplied applicability data, U2107 is identified as “Cannot relearn TPM.” Official GM communications also list U2107 among codes that can be associated with erratic electric power-steering boost. For hybrids, those communications list possible reduced-propulsion-power and “Service high voltage charging system” messages. A vehicle-specific diagnosis is required.

This page separates verified manufacturer/regulator evidence from supporting material. Unsupported causes, repairs or safety conclusions are not guessed.

Video guides

Watch Videos

Relevant videos play here without leaving this diagnostic page.

DTC Chevrolet U2107 Short ExplanationMaxidot

Videos are supporting material and never override OEM or regulator evidence.

1. What does U2107 mean?

For Chevrolet vehicles represented by the supplied applicability data, U2107 is identified as “Cannot relearn TPM.” Official GM communications also list U2107 among codes that can be associated with erratic electric power-steering boost. For hybrids, those communications list possible reduced-propulsion-power and “Service high voltage charging system” messages. A vehicle-specific diagnosis is required.

2. Technical explanation

The supplied diagnostic record defines U2107 as “Cannot relearn TPM.” The official NHTSA-hosted GM manufacturer communications (13-08-116-001 revisions C through I) list a Service Tire Pressure Monitoring (TPM) system light and inability to relearn TPM. They also state that erratic electric power-steering boost may be associated with U2107, alongside U2109, U2100, B1325, and C0000. The same communications identify reduced propulsion power and a “Service high voltage charging system” message as hybrid-specific items. The supplied excerpt does not establish that every listed symptom occurs on every vehicle with U2107, nor does it establish a specific root cause for an individual vehicle.

3. What system is affected?

Tire Pressure Monitoring (TPM) system is directly identified. The official communication also associates U2107 with potentially erratic electric power-steering boost. For hybrids, the communication lists propulsion-power and high-voltage-charging-system messages.

4. How serious is this code?

Not yet established by verified evidence. The supplied official communication identifies potentially erratic electric power-steering boost and hybrid-specific reduced-propulsion/high-voltage-charging messages, which warrant prompt professional assessment when present.

5. Symptoms you may notice

  • Service Tire Pressure Monitoring (TPM) system light illuminated.
  • Cannot relearn TPM.
  • Potentially erratic electric power-steering boost associated with U2107.
  • For hybrids: reduced propulsion power message.
  • For hybrids: “Service high voltage charging system” message.

6. Possible causes

  • The official communication says that, if no root cause is identified after normal SI diagnostics, further cause information applies; the supplied evidence excerpt does not include that cause information.
  • A specific cause for U2107 is not yet established by the supplied verified evidence.

7. Can I still drive the vehicle?

Not yet established by verified evidence. If reduced propulsion power, a “Service high voltage charging system” message, or erratic electric power-steering boost is present, seek prompt professional evaluation.

8. Can I charge the vehicle?

Not yet established by verified evidence. The supplied official communication lists a “Service high voltage charging system” message for hybrids but does not provide charging-operability or charging-safety instructions.

9. What you can safely do

  • Record all displayed messages and warning lamps.
  • Arrange diagnosis using normal GM Service Information (SI) procedures.
  • Do not attempt high-voltage system repair or diagnosis yourself.

10. Step-by-step troubleshooting

  1. Have a qualified service provider confirm stored diagnostic codes and perform the normal diagnostics specified in GM Service Information.
  2. For a TPM relearn concern, have the service provider verify the concern through the applicable manufacturer procedure.
  3. If present, report reduced-propulsion, high-voltage-charging-system, or steering-boost symptoms exactly as displayed or experienced.

11. When to contact service

Contact a Chevrolet dealer or qualified service provider promptly, particularly if the vehicle displays reduced propulsion power, “Service high voltage charging system,” or has erratic electric power-steering boost.

12. What the service center may check

  • Confirm U2107 and any accompanying diagnostic trouble codes.
  • Perform normal diagnostics using the applicable GM Service Information procedure.
  • Assess the reported TPM relearn concern and TPM warning indication.
  • If applicable, assess reduced-propulsion and “Service high voltage charging system” messages.
  • If applicable, assess reported electric power-steering boost behavior.

13. Possible repair or resolution

  • Not yet established by verified evidence. The supplied records do not identify a vehicle-specific repair.
  • Repair should follow the results of normal GM Service Information diagnostics.

14. Affected vehicles

15. Related TSBs / service bulletins

  • GM/NHTSA manufacturer communication 13-08-116-001I, NHTSA document MC-10239102-0001, published 2023-06-29: https://static.nhtsa.gov/odi/tsbs/2023/MC-10239102-0001.pdf
  • GM/NHTSA manufacturer communication 13-08-116-001H, NHTSA document MC-10222776-0001, published 2022-09-16: https://static.nhtsa.gov/odi/tsbs/2022/MC-10222776-0001.pdf
  • GM/NHTSA manufacturer communication 13-08-116-001G, NHTSA document MC-10213767-9999, published 2022-01-04: https://static.nhtsa.gov/odi/tsbs/2022/MC-10213767-9999.pdf
  • GM/NHTSA manufacturer communication 13-08-116-001F, NHTSA document MC-10183782-9999, published 2020-10-23: https://static.nhtsa.gov/odi/tsbs/2020/MC-10183782-9999.pdf
  • GM/NHTSA manufacturer communication 13-08-116-001E, NHTSA document MC-10163272-9999, published 2019-06-26: https://static.nhtsa.gov/odi/tsbs/2019/MC-10163272-9999.pdf
  • GM/NHTSA manufacturer communication 13-08-116-001C, NHTSA document MC-10140298-9999, published 2017-08-30: https://static.nhtsa.gov/odi/tsbs/2017/MC-10140298-9999.pdf

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Verified source: NHTSA-hosted GM manufacturer communications 13-08-116-001 revisions C through I. The supplied applicability data associates this diagnostic with Chevrolet Blazer (2011–2024), Bolt EUV (2011–2024 across overlapping records), Bolt EV (2011–2024 across overlapping records), Equinox (2011–2024), Spark (2011–2024 across overlapping records), and Volt (2011–2024 across overlapping records), all for the US. Exact model-year applicability should be confirmed against the applicable vehicle and bulletin.

19. Frequently asked questions

What does Chevrolet U2107 mean?

The supplied diagnostic record defines U2107 as “Cannot relearn TPM.”

Can U2107 be related to steering behavior?

The supplied official GM communication states that erratic electric power-steering boost may be associated with U2107, together with U2109, U2100, B1325, and C0000.

Can U2107 appear with hybrid warnings?

The supplied official GM communication lists reduced propulsion power and “Service high voltage charging system” messages as hybrid-specific items. It does not establish that these warnings will occur in every U2107 event.

Is there a confirmed fix for U2107?

Not yet established by verified evidence. The supplied evidence directs normal diagnosis using GM Service Information but does not provide a vehicle-specific repair in the excerpt.

20. Sources & verification

Verified
Chevrolet U2107: Cannot relearn TPM • Specific to Hybrids: – Reduced… | EV Diagnostics