P0E5BDC/DC Converter Temperature Sensor C Circuit 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
- P0E5B is stored when the signal of DC/DC converter temperature sensor C rises above its valid window. On an NTC circuit with pull-up resistor, that is the typical picture of an unplugged connector, a broken wire or a short to a supply voltage, and it reads as a converter far colder than possible. No manufacturer documents P0E5B publicly. Ford's limit for its sensor C, the boost converter inductor sensor, lies at 4.86 V; above that a fault is logged, yet Ford reports it as P0E59. Range checks of this kind are mandatory under CARB for hybrid inputs. Since a cold reading would hide real overheating, the controller treats the converter temperature as unknown and usually limits power. A connector check is the obvious first step. P0E5A is the low-signal counterpart.
- What you may notice
- Hybrid system warning
- Power limited as a precaution
- Likely causes
- LikelyConnector unplugged or sensor wire broken
- PossibleSignal shorted to a supply voltage
- PossibleThermistor open internally
- 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 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.