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TuningBot DTC Database · v4.37.14

P249D Closed Loop Reductant Injection Control At Limit - Flow Too Low

Generic (OBD-II) interpretation in the TuningBot DTC database.

P · PowertrainEmissionsOBD2

What P249D means

P249D
Closed Loop Reductant Injection Control At Limit - Flow Too Low Generic · emissions Data confidence 65%

The control module detected that the Closed Loop Reductant Injection Control At Limit - Flow value was below the expected limit.

Symptoms

  • MIL or SCR/AdBlue warning illuminated
  • Possible start-count-down or torque limitation on some applications

Possible causes

  • Reductant quality or level fault
  • Dosing valve or supply module fault
  • NOx sensor fault
  • Frozen or crystallized reductant lines
  • Wiring or connector fault

Recommended checks

  • Read NOx sensor values and dosing system status
  • Check reductant level and quality data
  • Inspect dosing valve, lines and heater operation
  • Check wiring and connectors of the SCR components
  • Check for OEM technical bulletins and software updates

Related and nearby codes

Related codes
P249CP249E
P24 range
P2400P2401P2402P2403P2404P2405P2406P2407P2408P2409P240AP240BP240CP240DP240EP240FP2410P2411

How to read P249D

P

Powertrain: engine, transmission and driveline systems.

2

Generic SAE-standard code: same meaning on every make.

49D

Specific fault index within the subsystem.

Frequently asked questions about P249D

What does P249D mean?

Closed Loop Reductant Injection Control At Limit - Flow Too Low. The control module detected that the Closed Loop Reductant Injection Control At Limit - Flow value was below the expected limit.

Is P249D generic or manufacturer-specific?

P249D is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.

Can TuningBot remove P249D at file level?

If the fault logic lives in the ECU calibration, yes: our DTC Removal file service disables the specific fault entry and, where the ECU needs it, corrects the checksum too. Not sure whether your case qualifies? Request a free assessment and our engineers will check your ECU file.

Other file services

Stage 1/2/3 TuningDPF RemovalEGR RemovalAdBlue / SCR RemovalDTC RemovalIMMO OFFSpeed Limiter (Vmax)

Understand the system behind this code: SCR / AdBlue System

ECU tuningDyno-tested results by model and engine See the results →

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