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TuningBot DTC Database · v4.37.15

P065D Reductant System Malfunction Lamp Control Circuit

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

P · PowertrainEmissionsOBD2

What P065D means

P065D
Reductant System Malfunction Lamp Control Circuit Generic · emissions Data confidence 78%

The control module detected improper operation of the Reductant System Malfunction Lamp Control circuit.

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

P06 range
P0600P0601P0602P0603P0604P0605P0606P0607P0608P0609P060AP060BP060CP060DP060EP060FP0610P0611

How to read P065D

P

Powertrain: engine, transmission and driveline systems.

0

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

65D

Specific fault index within the subsystem.

Frequently asked questions about P065D

What does P065D mean?

Reductant System Malfunction Lamp Control Circuit. The control module detected improper operation of the Reductant System Malfunction Lamp Control circuit.

Is P065D generic or manufacturer-specific?

P065D is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.

Can TuningBot remove P065D at file level?

If the fault logic lives in the ECU calibration, yes: our DTC Removal file service disables the specific fault entry. Checksum correction is not included: it is a separate, optional service. 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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