P0E55DC/DC Converter Current Sensor A Circuit Intermittent/Erratic
- 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
- P0E55 deals with a current sensor A reading that flickers or vanishes for moments instead of failing for good. FCA documents it repeatedly for the Ram 1500 with eTorque mild hybrid, where the DC/DC converter sits in the 48 V battery pack and is run by the battery pack control module (BPCM). Bulletin 08-030-24 for the 2019 model lists P0E55 among ten BPCM codes; 08-333-25 and its revision 08-283-26 for the 2025 truck with the 3.6 litre V6 name it alone and describe the result: the 12 V battery is not kept charged, runs flat soon after driving and may leave the truck needing a tow, later also with limp-home mode and disabled start/stop. In all cases the fix is new BPCM software, not a part. Steady circuit faults are P0E51, P0E53 and P0E54.
- What you may notice
- MIL on
- 12 V battery not charging, flat soon after driving
- Limp-home mode and start/stop disabled
- Likely causes
- LikelyBattery pack control module software (FCA eTorque, reflash)
- PossibleLoose or corroded contact in the sensor path
- RareCurrent sensor or converter electronics failing intermittently
- 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: €50 – €2,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.