P2066: owner reports and bulletins

Powertrain (generic, all makes). We haven't written the explanation for this code yet. Below is what owners and manufacturers have filed with NHTSA.

Got P2066 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

2 complaints filed with NHTSA mention P2066, 2 of them since 2015, across 2 different models. The component owners most often filed it under: fuel/propulsion system.

Manufacturer service bulletins that name P2066

18 technical service bulletins and manufacturer communications filed with NHTSA mention P2066, from 6 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:

  • JEEP GRAND CHEROKEE (2024), bulletin 11006980: "Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set the following Diagnostic Trouble Code (DTC): P2066 - Fuel Level S…
  • CHRYSLER 300 (2016), bulletin 10224750: Flash: Powertrain Diagnostic and System Enhancements This bulletin involves reprogramming the Powertrain Control Module (PCM) with thelatest available software. Customers may experience a Malfunction Indicator Lamp (MIL)…
  • DODGE CHALLENGER (2016), bulletin 10224750: Flash: Powertrain Diagnostic and System Enhancements This bulletin involves reprogramming the Powertrain Control Module (PCM) with thelatest available software. Customers may experience a Malfunction Indicator Lamp (MIL)…
  • RAM 4500 (2014), bulletin 10129033: Flash: 6.4L Diagnostic And System Improvements This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software. NOTE: **This bulletin contains optional software update t…
  • RAM 2500 (2014), bulletin 10135118: Flash: 6.4L Diagnostic And System Improvements This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software. NOTE: **This bulletin contains optional software update t…
  • RAM 5500 (2014), bulletin 10217742: Flash: 6.4L Diagnostic And System Improvements This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software. NOTE: **This bulletin contains optional software update t…

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.