P0E59DC/DC Converter Temperature Sensor C Circuit Range/Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- P0E59 is the best-documented member of this group. Ford's hybrid OBD summaries from 2015 to 2019 assign it to the inductor temperature sensor of the variable voltage converter and monitor it without pause once 500 ms have passed since power-up, provided the 12 V supply lies between 6 and 19 V. It fails on any of three conditions: a sensor voltage under 0.067 V or over 4.86 V, an inductor reading above 165 °C for 1 s, or a value more than 30 °C away from engine coolant temperature after a soak of 180 minutes. Ford thus folds the electrical range checks into this code instead of using P0E5A/P0E5B. FCA also uses P0E59 on the 2021 Ram 1500 eTorque; bulletin 08-037-21 makes it a one-trip code with new HCP software. Sensors A and B have P0C39 and P0C3E as their plausibility codes.
- What you may notice
- MIL on, at FCA after one faulty drive
- Reduced hybrid assist or electric driving
- Hybrid system warning
- Likely causes
- PossibleInductor temperature sensor drifting, reading off after cold soak
- PossibleInductor really overheating, e.g. due to weak electronics cooling
- PossibleHybrid control software (FCA HCP update)
- RareShort or open in the sensor circuit (Ford range limits)
- 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: €60 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.