P215EReductant Heater D Current Too Low
- 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
- P215E says the fourth DEF heating element, heater D, drew less current than expected while it was switched on, so it is probably not warming the fluid. Which element carries the letter D depends on the maker; many SCR systems stop at three. No maker documents P215E publicly. GM's 2025 Duramax tables and Ford's 2023 diesel summary check only heaters A to C; GM flags their currents below 0.75 A across 40 readings, one per tenth of a second, as Type A; Ford watches power and current during each heating cycle. GM bulletin 21-NA-149 does show a heater D on the 3.0 L LM2, but only with circuit codes P20C5 and P20C8. The usual causes are an open or burnt element, high resistance at the connector or a missing heater feed. P215F is the high-current partner, P20C5 to P20C8 the control-circuit faults. In frost the fluid may thaw late.
- What you may notice
- Check engine light together with a DEF or emission system message
- Dosing starts late or not at all after cold starts in frost
- Restart countdown or speed limitation if the fault stays active
- Likely causes
- LikelyHeating element D open or burnt through, often inside a heated line or pump assembly
- PossibleCorroded or loose pins at the heater D connector limiting current
- PossibleHeater feed fuse or relay open, so the element gets no voltage
- RareWeak heater output stage in the engine or DEF control module
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €80 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.