P0AF714 Volt Power Module Internal Temperature Too High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- The 14 V power module is the DC/DC converter that feeds the 12 V network from the high-voltage battery in hybrids and EVs. P0AF7 reports that its internal temperature has exceeded the protection limit, a real overheat rather than a sensor circuit fault. No manufacturer documents this exact code publicly. GM's 2013 eAssist table shows how the same module is watched: its Accessory Power Module has two temperature sensors with their own circuit codes, and the separate code P0C32 compares sensor 1 with a thermal model and fails if they differ by more than 15 °C. CARB requires monitoring of hybrid components. Common causes are a blocked cooling path, a weak coolant pump or fan, or a constantly high 12 V load. The module then derates its output, so the 12 V battery may run down.
- What you may notice
- Warning lamp or 12 V charging warning
- Low 12 V voltage, flickering lights
- Comfort consumers switched off
- Likely causes
- LikelyRestricted cooling, weak coolant pump or failed cooling fan
- PossibleSustained high 12 V load or weak 12 V battery
- RareInternal fault of the DC/DC converter
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €80 – €2,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.