14 Volt Power Module Internal Temperature Too High
What it means
The 14 volt power module is running too hot inside. This module supplies the normal electrical system, so it may limit output to protect itself.
Can I keep driving? Usually okay for a short, gentle trip, but this module is part of the hybrid/EV high voltage system; a weak low-voltage supply can cause warnings or a shutdown, so get it read soon and stop if the car loses drive power or the warning turns red.
Common symptoms
What you'll notice
- Warning light on the dashboard
- Issues with electrical components (e.g. radio, lights)
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Common causes
Most likely first
- Faulty cooling system
- Electrical wiring issues
- Malfunctioning temperature sensor
Repair
Likely repair
- Parts often involved: DC-DC converter
- Labor: 0.5–5 h
- Difficulty: Hard
- DIY: Garage only
How to diagnose & fix
Work through it in order
- Check and clean the ventilation system for any blockages or obstructions.
- Inspect the power module for any damage or signs of overheating, such as burnt wires or components.
- Verify the cooling fan operation and replace if necessary.
- Check the electrical connections and ensure they are secure and free from corrosion.
- Consider replacing the power module if all other solutions do not resolve the issue.
Related codes
About this page
Scan figures come only from diagnostic scans recorded through our own apps and tools. Cars are usually scanned because a symptom or warning light prompted it, so these figures describe our scan records, not how often a fault occurs in any make or model.
Notes about specific manufacturers summarise public records (NHTSA owner complaints, recalls and manufacturer service bulletins), cited under each note. They report what those records say, not our measurements, and they do not suggest that any manufacturer or vehicle is better or worse than another.
Repair time and cost estimates come from a public repair dataset and are typical ranges, not quotes.
OBD DashX is not affiliated with, sponsored by or endorsed by any vehicle manufacturer. Manufacturer and model names and trademarks belong to their owners and are used only to identify vehicles.
This page is general information, not professional advice. Have safety-critical faults (brakes, steering, airbags, high-voltage systems) checked by a qualified technician. To the extent the law allows, we accept no liability for repairs or decisions made from this page.
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