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Chevrolet P305D

Removed Holden Equinox, added Descriptors to the DTCs, inserted an Important that states the Battery Monitor Module may also be called the Battery Sensor Module and the Battery Mon

DriveUnknown. The diagnostic record lists safe-to-drive status as unknown.
ChargeUnknown. The diagnostic record lists safe-to-charge status as unknown.
ServiceService requirement is unknown in the supplied diagnostic record. A qualified Chevrolet/GM service provider can determine the applicable diagnostic procedure for the vehicle.
Confidence95%

Quick answer

For U.S. 2021–2023 Chevrolet Bolt EV and Bolt EUV, P305D is referenced in GM/NHTSA manufacturer communication 15-NA-087. The supplied verified record does not establish the actual fault definition, symptoms, driving/charging status, or repair for this code.

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 P305D mean?

For U.S. 2021–2023 Chevrolet Bolt EV and Bolt EUV, P305D is referenced in GM/NHTSA manufacturer communication 15-NA-087. The supplied verified record does not establish the actual fault definition, symptoms, driving/charging status, or repair for this code.

2. Technical explanation

The verified source is NHTSA-posted GM manufacturer communication 15-NA-087, revised October 25, 2022. Its revision history states that DTCs P305D and P305E were added in December 2018, and that a February 2019 revision added descriptors to the DTCs. It also states that the Battery Monitor Module may be called the Battery Sensor Module or Battery Monitor Sensor. The supplied evidence does not include the P305D descriptor or diagnostic criteria.

3. What system is affected?

Not yet established by verified evidence. The source references Battery Monitor Module terminology, but the supplied evidence does not establish that P305D identifies a fault in that component.

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

  • Do not attempt high-voltage diagnosis or repair based on this information alone.
  • Have a qualified Chevrolet/GM service provider evaluate the vehicle if P305D is present.

10. Step-by-step troubleshooting

  1. Confirm the stored code and obtain the complete diagnostic report from a qualified service provider.
  2. Consult the applicable GM service information and manufacturer communication 15-NA-087. The supplied evidence does not provide a step-by-step diagnostic procedure.

11. When to contact service

Service requirement is unknown in the supplied diagnostic record. A qualified Chevrolet/GM service provider can determine the applicable diagnostic procedure for the vehicle.

12. What the service center may check

  • Retrieve and document P305D and any accompanying diagnostic information.
  • Use applicable GM service information. Specific tests, inspection points, and acceptance criteria are not established by the supplied verified evidence.

13. Possible repair or resolution

  • Not yet established by verified evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • GM/NHTSA manufacturer communication 15-NA-087, published October 25, 2022 (NHTSA MC-10225708-0001). The supplied revision history states that P305D was added in a December 2018 revision and descriptors were added in a February 2019 revision.
  • The communication notes that Battery Monitor Module may also be termed Battery Sensor Module or Battery Monitor Sensor.

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Official source: NHTSA Manufacturer Communication PDF 10225708, GM communication 15-NA-087: https://static.nhtsa.gov/odi/tsbs/2022/MC-10225708-0001.pdf

19. Frequently asked questions

Which vehicles are supported by the supplied evidence?

U.S. 2021–2023 Chevrolet Bolt EV and 2021–2023 Chevrolet Bolt EUV.

What does P305D mean?

Not yet established by the supplied verified evidence. The supplied diagnostic title and meaning are revision-history text rather than a fault definition.

Is P305D safe to drive or charge with?

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

Is P305D covered by a recall?

Not yet established by verified evidence.

20. Sources & verification

Verified
Chevrolet P305D: Removed Holden Equinox, added Descriptors to the… | EV Diagnostics