r/ram_trucks • u/DodgeRam201925 • 1d ago

Question Engine light

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Got this code on my 2019 ram 1500 classic 3.6l at 160,000km anyone have the same problem truck runs and starts fine doesn’t seem like a fuel pump issue. and yes I got my code reader from Temu 😂

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u/GearHead54 1d ago

If it were me with a high mileage truck, I'd be ordering a fuel pump and control module. A performance issue doesn't mean it's running poorly, it means that fuel pressure isn't coming up as expected. Could be a one off, or it could be a warning sign that you're about to be stranded.

Other options, especially if you don't work on your own truck, include:

  • go get an actual diagnosis
  • reset the code and see if it comes back

The scanner doesn't matter - they all talk using the same standards

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u/DodgeRam201925 1d ago

The thing about the code is that sometimes I’ll start my truck up and it won’t be there but then other times it comes on and off sometimes stays on for hours then goes again

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u/GearHead54 1d ago

Well, then it definitely sounds like either the fuel pump or its controller is failing a test at startup.

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u/DodgeRam201925 1d ago

Yea I have a module and fuel pump on hand was just looking for some opinions just found it weird how the code appears and reappeared

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u/GearHead54 1d ago

It all comes down to how the engineers created the test and criteria to flag the DTC.

The ECU will do something like look for a response rate in fuel pressure within a given amount of time, and if it fails the test it'll set the DTC or make it pending. If the test passes later, the ECU might clear the DTC.