P214D code meaning
SCR NOx Catalyst Outlet Temperature Too High During Particulate Filter Regeneration
Powertrain system Generic code P21xx codes Check engine light
What P214D means
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.
P214D at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 4 hours
- Clears after repairAfter a drive cycle
Symptoms of P214D
- Check engine light on
- Regeneration aborted or repeated
- Additional exhaust temperature sensor codes
Common causes of P214D
- Most 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
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
SCR catalystExhaust gas temperature sensor
What each part of P214D means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 1 | Area: fuel and air metering. |
| 4D | The exact fault in that area. |
What to do next
- Note P214D and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P214D
What does P214D mean?
P214D means "SCR NOx Catalyst Outlet Temperature Too High During Particulate Filter Regeneration". P214D sets when the temperature behind the SCR catalyst exceeds its limit while the particulate filter is regenerating. It is a generic code, so it means the same on every make.
Is it safe to drive with P214D?
Drive gently and only to a workshop. With P214D the car can go into limp mode (reduced power) to protect itself.
Will P214D fail an emissions test?
Yes, it can. P214D is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P214D to fix?
Difficulty: medium. A typical repair takes 0.5 to 4 hours of work. This is a job for a workshop.
Will P214D clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.