Getting 0455 CEL Evaporative Emission System - what should I look at first?

bajabronco · Aug 11, 2019

I am getting the stupid 0455 CEL code fairly frequently now after my Rubicon trip. The gas cap has been changed out and is good. What are the other things I should be checking? I don't smell anything near the fuel tank. Any recommendations on what to check and in what order?

Tim_MN · Aug 11, 2019

A basic Google search find this:

P0455 JEEP - EVAP System Large Leak

Possible causes
•Missing or loose fuel cap
•Incorrect fuel filler cap used
•Fuel filler cap remains open or fails to close
•Foreign matter caught in fuel filler cap
•EVAP canister or fuel tank leaks
•EVAP system hose leaking
•Fuel tank leaking

RCP Phx · Aug 11, 2019

Year would help....

bajabronco · Aug 11, 2019

Tim_MN, I know what the error code means, I was just asking if people have had personal experience of solving the code, other than just getting a new gas cap, which I have already done.

RCP Phx, it is a 2000 XJ.

Tim_MN · Aug 11, 2019

Evap system hoses, hose fittings, and fuel tank hoses, fuel tank vent tube, or the fuel pump assembly lock ring gasket would be likely suspects.

RCP Phx · Aug 11, 2019

Check everything at the canister, which is just in front of the gas tank. Then you have another line that runs forward to the purge valve.

bajabronco · Aug 11, 2019

Ok thanks RCP Phx & Tim_MN! -It will be a maintenance Sunday on the XJ today. Yesterday was install the new Method beadlock day !

97xjnova · Aug 13, 2019

Check the line from tank to canister

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Getting 0455 CEL Evaporative Emission System - what should I look at first?

bajabronco

NAXJA Forum User

Tim_MN

Freakish Hand Strength

RCP Phx

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bajabronco

NAXJA Forum User

Tim_MN

Freakish Hand Strength

RCP Phx

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bajabronco

NAXJA Forum User

97xjnova

NAXJA Forum User

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