P0E52DC/DC Converter Current Sensor A 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
- P0E52 is the plausibility test of current sensor A: the signal is electrically valid, yet the measured current does not fit what the converter is doing. Two makers name it. FCA lists it for the 2021 Ram 1500 with the 3.6 litre eTorque mild hybrid; bulletin 08-037-21 brings new HCP software and turns P0E52 from a two-trip into a one-trip code, so the MIL may light after a single faulty drive. Ford reports it from the inverter system controller of the 2024–2026 Lincoln Nautilus and the 2025–2026 Maverick hybrid, together with several motor and inverter codes; the car loses power and shows Stop Safely Now or Service Vehicle Soon, and the special service message tells dealers to replace that controller. Pure circuit faults are P0E51, P0E53 and P0E54.
- What you may notice
- MIL on, often after only one drive
- Limited power with Stop Safely Now or Service Vehicle Soon message
- Reduced eTorque assist or start/stop function
- Likely causes
- LikelyControl software with unsuitable limits (FCA eTorque HCP update)
- PossibleInternal fault of the inverter system controller (Ford hybrid)
- PossibleCurrent sensor drifting or offset out of tolerance
- RareHigh resistance at sensor connector or ground
- 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 – €3,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.