P1404: owner reports and bulletins

Powertrain (manufacturer-specific). We haven't written the explanation for this code yet. Below is what owners and manufacturers have filed with NHTSA.

Got P1404 on your scanner? Tell the mechanic your year, make, model and any symptoms and you'll get the likely cause and what to check first. Ask about this code.

What owners report to NHTSA

6 complaints filed with NHTSA mention P1404, 1 of them since 2015, across 6 different models. The component owners most often filed it under: engine and engine cooling:exhaust system:emission control:gas recirculation valve (egr valve).

Manufacturer service bulletins that name P1404

24 technical service bulletins and manufacturer communications filed with NHTSA mention P1404, from 3 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:

  • RAM 5500 (2024), bulletin 11005319: "Heavy Duty Exhaust Gas Recirculation (EGR) Valve Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): P…
  • JEEP GLADIATOR (2020), bulletin 10178688: Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further inves…
  • RAM 3500 (2020), bulletin 10228049: Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the correct software. This vehiclemay have been programmed with incorrect software. The customer may experience Active Nois…
  • RAM 2500 (2019), bulletin 10241064: Flash: Powertrain Control Module (PCM) Updates Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that one or more of the following Diagnostic Tro…
  • FCA ALL MODELS (2006, 2007, 2008, 2009), bulletin 10150486: Cooled EGR Assembly This Tech Tip applies to Ram DJ, D2, DD trucks for 2014 and 2015 model years equipped with the 6.4 ESA and 6.4 ESB HEMI Heavy Duty engines. Please contact engineering prior to replacing any components…

Sources: NHTSA Office of Defects Investigation complaint database and manufacturer communications file, snapshots September 2026. A complaint or bulletin that mentions a code is a report about that vehicle, not a statement that the code has one cause.