Cadillac P0300
2014 VOLT — SERVICE HIGH VOLTAGE CHARGING SYSTEM Message Displayed on Driver Information Center (DIC), Hybrid/EV Charging System Disabled, DTCs Set, Revised HV Battery Surge T ank
Quick answer
Cadillac P0300: 2014 VOLT — SERVICE HIGH VOLTAGE CHARGING SYSTEM Message Displayed on Driver Information Center (DIC), Hybrid/EV Charging System Disabled, DTCs Set, Revised HV Battery Surge T ank
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 Cadillac P0300 mean?
Cadillac P0300: 2014 VOLT — SERVICE HIGH VOLTAGE CHARGING SYSTEM Message Displayed on Driver Information Center (DIC), Hybrid/EV Charging System Disabled, DTCs Set, Revised HV Battery Surge T ank
2. Technical explanation
The identity of P0300 is verified for Cadillac. Available evidence does not yet establish a narrower subsystem or component-level failure.
3. What system is affected?
Not yet established by verified evidence.
4. How serious is this code?
Not yet established by verified evidence. Urgency must be based on the exact vehicle warning and official guidance.
5. Cadillac P0300 symptoms you may notice
Not yet established by verified evidence.
6. Possible causes of Cadillac P0300
Not yet established by verified evidence. A diagnostic identifier alone is not proof that a specific component has failed.
7. Can I drive with Cadillac P0300?
Not yet established by verified evidence.
8. Can I charge with Cadillac P0300?
Not yet established by verified evidence.
9. What you can safely do
- Preserve the exact diagnostic code and any accompanying vehicle warning before clearing anything.
- Follow the manufacturer instructions shown in the vehicle or owner/service documentation.
- Do not open or work on high-voltage components unless you are qualified and equipped for high-voltage service.
10. How to troubleshoot Cadillac P0300
- Record the exact code, warning text, vehicle model, model year, and operating condition when it appeared.
- Check the verified manufacturer or regulator source linked on this page for code-specific instructions.
- Avoid replacing parts based only on the code; code-specific component tests are not inferred when evidence does not provide them.
- Escalate to qualified service when the warning persists, affects driving/charging, or manufacturer guidance requires service.
11. When to contact service
Qualified service should be contacted if the warning persists, returns after a normal manufacturer-permitted restart, or affects driving or charging.
12. What the service center may check
Not yet established by verified evidence.
13. Possible repair or resolution for Cadillac P0300
Not yet established by verified evidence.
14. Affected vehicles
Not yet established by verified evidence.
15. Related TSBs / service bulletins
- NHTSA: NHTSA Manufacturer Communication PDF 10138621: 13-00-89-004F
16. Recall information
No recall relationship is established by verified evidence.
17. Official manufacturer information
013- 2014 ATS, CTS, Camaro — Malfunction Indicator Lamp Flashes Due to Engine Misfire On Acceleration, DTC P0300 and/or P0303 Set Load new calibration enhancement for diagnostic for DTC P0300 / P0303 misfire on vehicle where the SES is Illuminated between RPM range of 2200 to 4400 RPM. Replace Spark plugs, Ignition coils and Fuel injectors for DTC P0300 / P0303 and SES set between 2200 to 4400 RPM range. PI1122A 2011- 2014 VOLT — SERVICE HIGH VOLTAGE CHARGING SYSTEM Message Displayed on Driver Information Center (DIC), Hybrid/EV Charging System Disabled, DTCs Set, Revised HV Battery Surge T ank Coolant Fill Level When the battery coolant is low it is imperative that the system be pressure tested
19. Cadillac P0300 frequently asked questions
What does P0300 mean?
Cadillac P0300: 2014 VOLT — SERVICE HIGH VOLTAGE CHARGING SYSTEM Message Displayed on Driver Information Center (DIC), Hybrid/EV Charging System Disabled, DTCs Set, Revised HV Battery Surge T ank
Can I drive with P0300?
Not yet established by verified evidence.
Can I charge with P0300?
Not yet established by verified evidence.
Does P0300 require service?
Qualified service should be contacted if the warning persists, returns after a normal manufacturer-permitted restart, or affects driving or charging.