Chevrolet C0090
Model: Model Year: B
Quick answer
For a 2025 Chevrolet Equinox in the U.S., DTC C0090 is documented in a Chevrolet Engineering Information bulletin for an AWD lamp illuminated in the Driver Information Center (DIC). The supplied evidence does not establish the code’s technical definition, root cause, drivability, charging status, or repair.
This page separates verified manufacturer/regulator evidence from supporting material. Unsupported causes, repairs or safety conclusions are not guessed.
Watch Videos
Relevant videos play here without leaving this diagnostic page.
No sufficiently relevant embeddable video has been accepted for this diagnostic yet.
Videos are supporting material and never override OEM or regulator evidence.
1. What does C0090 mean?
For a 2025 Chevrolet Equinox in the U.S., DTC C0090 is documented in a Chevrolet Engineering Information bulletin for an AWD lamp illuminated in the Driver Information Center (DIC). The supplied evidence does not establish the code’s technical definition, root cause, drivability, charging status, or repair.
2. Technical explanation
Verified NHTSA-hosted manufacturer communication PIE0814B, dated May 2025, identifies DTC C0090 in connection with an illuminated AWD lamp on the Driver Information Center. The supplied diagnostic record’s canonical meaning is incomplete (“Model: Model Year: B”), so a technical meaning beyond the bulletin wording is not established by verified evidence.
3. What system is affected?
AWD-related warning indication is supported by the bulletin wording. The specific component or subsystem is not yet established by verified evidence.
4. How serious is this code?
Unknown. The supplied evidence does not assign a severity level.
5. Symptoms you may notice
- AWD lamp illuminated on the Driver Information Center (DIC).
6. Possible causes
- Not yet established by verified evidence.
7. Can I still drive the vehicle?
Unknown. The supplied evidence does not establish whether the vehicle is safe to drive with C0090.
8. Can I charge the vehicle?
Unknown. The supplied evidence does not establish whether charging is affected or safe.
9. What you can safely do
- Arrange diagnosis by a Chevrolet dealer or qualified service provider if the AWD lamp is illuminated and DTC C0090 is present.
- Do not attempt high-voltage or drivetrain repairs based on this information; no repair procedure is established by the supplied evidence.
10. Step-by-step troubleshooting
- Confirm the presence of DTC C0090 with suitable diagnostic equipment.
- Document the AWD lamp/DIC condition for the service provider.
- Use the applicable Chevrolet service information and manufacturer guidance for diagnosis; detailed diagnostic steps are not provided in the supplied evidence.
11. When to contact service
Service is recommended because an official Chevrolet Engineering Information communication addresses an AWD lamp illuminated with DTC C0090. The urgency and required repair are not established by the supplied evidence.
12. What the service center may check
- Verify DTC C0090 and the AWD lamp condition.
- Review Chevrolet Engineering Information PIE0814B and current applicable manufacturer service information.
13. Possible repair or resolution
- Not yet established by verified evidence.
14. Affected vehicles
- Chevrolet Equinox · 2025 · US
15. Related TSBs / service bulletins
- Chevrolet Engineering Information PIE0814B, published May 7, 2025 and hosted by NHTSA as manufacturer communication MC-11023056-0001. It concerns an AWD lamp illuminated on the DIC with DTC C0090 set.
- PIE0814B states it was revised to end the need for gathering information from the field and instructs users to discard PIE0814A.
16. Recall information
- No recall information is established by the supplied evidence.
17. Official manufacturer information
Official source: NHTSA-hosted Chevrolet manufacturer communication PIE0814B (MC-11023056-0001), published May 7, 2025: https://static.nhtsa.gov/odi/tsbs/2025/MC-11023056-0001.pdf
19. Frequently asked questions
What does C0090 mean on a 2025 Chevrolet Equinox?
The supplied official bulletin associates C0090 with an AWD lamp illuminated on the DIC. A specific technical definition is not yet established by verified evidence.
Which vehicle is covered by the supplied evidence?
The supplied applicability record identifies the 2025 Chevrolet Equinox for the U.S. market.
Can I drive with C0090?
Not yet established by verified evidence. The supplied bulletin does not provide a drivability determination.
Is C0090 related to charging?
Not yet established by verified evidence. The supplied evidence does not describe charging effects.