Chevrolet P0C28
Delivery Inspection. For vehicles in this category, reprogram the Drive Motor Power Inverter Module to the latest calibrations available. If the engine fails to start or
Quick answer
For a 2016–2017 Chevrolet Volt in the US, P0C28 is covered by GM bulletin 16-NA-400 in a specific pre-delivery/very-low-mileage scenario. The bulletin directs dealers to reprogram the Drive Motor Power Inverter Module with the latest available calibrations when the listed conditions are met; otherwise, use normal SI diagnostics for P0C28.
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 P0C28 mean?
For a 2016–2017 Chevrolet Volt in the US, P0C28 is covered by GM bulletin 16-NA-400 in a specific pre-delivery/very-low-mileage scenario. The bulletin directs dealers to reprogram the Drive Motor Power Inverter Module with the latest available calibrations when the listed conditions are met; otherwise, use normal SI diagnostics for P0C28.
2. Technical explanation
Verified evidence identifies P0C28 in Chevrolet bulletin 16-NA-400. The available bulletin extract states that vehicles with very low mileage or a green engine may have a malfunction indicator lamp with this DTC and no other codes, typically during pre-delivery inspection. For vehicles in that category, it directs reprogramming the Drive Motor Power Inverter Module to the latest calibrations available. If the module already has the latest calibration, or all bulletin conditions are not met, the extract directs normal SI diagnostics for P0C28. The supplied diagnostic title/meaning is truncated and should not be interpreted as a complete generic definition of P0C28.
3. What system is affected?
Drive Motor Power Inverter Module, based on the reprogramming instruction in Chevrolet bulletin 16-NA-400.
4. How serious is this code?
Not yet established by verified evidence.
5. Symptoms you may notice
- A Malfunction Indicator Lamp may be present with P0C28 and no other codes on vehicles with very low mileage or a green engine, typically during pre-delivery inspection.
6. Possible causes
- Not yet established by verified evidence. The verified bulletin supports a calibration update in a defined pre-delivery/very-low-mileage scenario but does not establish a general root cause from the supplied extract.
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
- Have a Chevrolet/GM-qualified service facility check whether the vehicle meets the conditions in bulletin 16-NA-400.
- Do not attempt Drive Motor Power Inverter Module programming yourself.
- If the vehicle does not meet the bulletin conditions or the module is current, have normal SI diagnostics for P0C28 performed.
10. Step-by-step troubleshooting
- Confirm the vehicle is a US-market 2016–2017 Chevrolet Volt.
- Check whether P0C28 is present with no other codes and whether the vehicle has very low mileage or a green engine in a pre-delivery context.
- A qualified service facility should determine whether the Drive Motor Power Inverter Module has the latest calibration.
- If the calibration is current, or the listed conditions are not all met, proceed with normal SI diagnostics for P0C28 as directed by the bulletin.
11. When to contact service
Service evaluation is appropriate because the verified instruction involves Drive Motor Power Inverter Module programming and, outside the defined bulletin scenario, normal SI diagnostics.
12. What the service center may check
- Verify applicability to a 2016–2017 Chevrolet Volt in the US.
- Evaluate whether the very-low-mileage/green-engine and no-other-codes conditions described in bulletin 16-NA-400 are met.
- Check Drive Motor Power Inverter Module calibration status.
- Reprogram the Drive Motor Power Inverter Module to the latest available calibrations when the bulletin conditions are met.
- Perform normal SI diagnostics for P0C28 if the module is current or the conditions are not all met.
13. Possible repair or resolution
- For the specific scenario described in bulletin 16-NA-400, reprogram the Drive Motor Power Inverter Module to the latest available calibrations.
- If that scenario does not apply, resolution is not established by the supplied evidence; the bulletin directs normal SI diagnostics for P0C28.
14. Affected vehicles
- Chevrolet Volt · 2016–2017 · US
15. Related TSBs / service bulletins
- GM/Chevrolet bulletin 16-NA-400, published through NHTSA manufacturer communication PDF 10111768 on 2016-12-08. The supplied extract addresses P0C28 in a very-low-mileage or green-engine pre-delivery scenario and directs Drive Motor Power Inverter Module reprogramming when all listed conditions are met.
16. Recall information
- Not yet established by verified evidence.
17. Official manufacturer information
Official source: NHTSA Manufacturer Communication PDF 10111768, Chevrolet/GM bulletin 16-NA-400: https://static.nhtsa.gov/odi/tsbs/2016/MC-10111768-9999.pdf
19. Frequently asked questions
Which vehicles are supported by the verified evidence?
The supplied applicability evidence is for US-market 2016–2017 Chevrolet Volt vehicles.
Does P0C28 always require inverter module programming?
No. The verified bulletin directs programming only when its listed conditions are met. If the module is already current or all conditions are not met, it directs normal SI diagnostics for P0C28.
Can I safely drive or charge with P0C28?
Not yet established by verified evidence.