MarshRam
Senior Member
- Joined
- May 24, 2017
- Posts
- 2,209
- Reaction score
- 1,414
- Location
- Florida
- Ram Year
- 2014 SLT 4x4, 2012 ST
- Engine
- Hemi 5.7
Gas cap light and CEL - FIXED
For the last couple months I have been getting the gas cap loose light and also throwing numerous codes related to the loose cap or evap leak. I have not done a smoke test, but have inspected all the lines and don't see any visible signs of loose fittings or deterioration. All lines actually look good as new. Gas cap threading and rubber look fine as well. Did the vaseline trick, but that didn't help.
The gas cap light and codes have a routine that seems related to the amount of gas in the tank. Starting with no codes or gas light present, I'll fill up the tank. After a couple key cycles or on or around 1/8th of a tank used, the gas light comes on. A couple more key cycles or on or around 3/4th a tank engine light comes on. On or around 1/4th tank left the gas light goes off. On or 1/8th tank left the CEL clears and engine light goes off. Once they clear my scanner will also not pickup any codes.
This has been routine for the last 10 fill ups or so. The codes are 0451, 0456 and 0457. It has thrown a couple other evap related codes as well that I cant remember, but they are in the P045* sequence related to evap leak. Each time, the codes could be different, maybe just on or two, or a combination of all of them.
Has anyone experienced this and did you find a culprit?
FIXED: I removed the tether, see post 13.
For the last couple months I have been getting the gas cap loose light and also throwing numerous codes related to the loose cap or evap leak. I have not done a smoke test, but have inspected all the lines and don't see any visible signs of loose fittings or deterioration. All lines actually look good as new. Gas cap threading and rubber look fine as well. Did the vaseline trick, but that didn't help.
The gas cap light and codes have a routine that seems related to the amount of gas in the tank. Starting with no codes or gas light present, I'll fill up the tank. After a couple key cycles or on or around 1/8th of a tank used, the gas light comes on. A couple more key cycles or on or around 3/4th a tank engine light comes on. On or around 1/4th tank left the gas light goes off. On or 1/8th tank left the CEL clears and engine light goes off. Once they clear my scanner will also not pickup any codes.
This has been routine for the last 10 fill ups or so. The codes are 0451, 0456 and 0457. It has thrown a couple other evap related codes as well that I cant remember, but they are in the P045* sequence related to evap leak. Each time, the codes could be different, maybe just on or two, or a combination of all of them.
Has anyone experienced this and did you find a culprit?
FIXED: I removed the tether, see post 13.
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