Dodge Ram NOX Codes Active - MIL ON
Oct. 01 2023
Oct. 01 2023

Vehicle: 2014 Dodge Ram 1500, 4WD, V6-3.0L DSL Turbo, Automatic Transmission/Transaxle

Mileage: 155,809

Problem: This Ram was dropped off at the shop because the malfunction indicator light (MIL) was on.

Case Details: After connecting a scan tool, the technician found the following two diagnostic trouble codes (DTCs).

  • P20EE - SCR NOX Catalyst Efficiency Below Threshold Bank 1
  • P2BA9 - NOX Exceedance – Insufficient Reductant Quality

There was also a warning message in the instrument cluster stating that there were 23.6 miles remaining before a “No Start” condition.

The technician replaced a damaged, leaking DEF pressure line, but the DTCs would not clear, and no resets were working in his scan tool.

Confirmed Repair: He decided to activate all the DEF heaters and do a forced regen with his scan tool. After that, he refilled the DEF tank with fresh fluid and went for a test drive. The DTCs cleared and the warning message disappeared. Fixed!

The ALLDATA Tech-Assist team fields cases like this every day. See how Tech-Assist can help your shop save time and money with on-call diagnostic support from ASE-certified Master Technicians. More Tech Tips 

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