P214DSCR NOx Catalyst Outlet Temperature Too High During Particulate Filter Regeneration
- 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
- P214D sets when the temperature behind the SCR catalyst exceeds its limit while the particulate filter is regenerating. It is the only code of this group with public manufacturer evidence. Ram pickups with the 6.7L Cummins use it: bulletin 18-053-14 (2014 Ram 2500/3500) reprograms the PCM partly to prevent unnecessary MIL events from P214D, and STAR case S2625000004 (2025–2026 Ram 3500 to 5500) groups it with exhaust temperature sensor codes such as P242B and P2470–P2472, asks for a check of battery voltage first and stresses identifying each sensor by name. That points to sensor faults and calibration as frequent causes, besides genuine overheating from hydrocarbons burning on the hot SCR during regeneration. P214B is the inlet counterpart.
- What you may notice
- Check engine light on
- Regeneration aborted or repeated
- Additional exhaust temperature sensor codes
- Likely causes
- LikelyExhaust temperature sensor behind the SCR faulty, confused with another sensor or affected by low battery voltage
- PossiblePCM software requiring an update (Ram 6.7L bulletins)
- PossibleRegeneration fuel slipping through and burning on the SCR
- 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: €100 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.