2021 3.0 L Eco Diesel

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20RAM21

Junior Member
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Jan 22, 2022
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Location
Santa Clarita
Ram Year
2021
Engine
3.0 L Eco Diesel
I just finished the 2nd Maintenace on my 2021 3.0 L Eco Diesel. After changing the fuel filter the check engine light came on and am looking for any help as to correcting this. I have driven the truck 250 miles since and still is on.
 

crash68

ACME product engineer
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Ram Year
2015
Engine
3.0 EcoDiesel
I doubt changing the fuel filter caused the code but did you prime the fuel system by cycling the key to the on position without starting the engine at least 3-4 times for about 30 seconds each. You can usually hear the air bleed and the pump sound will change when the air is out.
You'll need to pull the code to find out what causing the CEL.
 

fishmoss

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Military
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Jun 26, 2021
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Location
Baltimore
Ram Year
2021
Engine
3.0 ECO Diesel
I have a 2021 Limited with the Eco Diesel. Some times the flap in the fuel filler tube doesn't close properly and the engine light comes on. I just poke the flap a couple of times and restart, light goes off. Also make sure your fuel door is closed and the seal is not obstructed.
 
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