The Mud Pit > Wrenching
01 XJ 4.0L auto check engine light
CnoteTJ:
My buddy started up his XJ this morning and immediately got the check engine light. After allowing it to warm up for 5 minutes he came back and it was already starting to overheat! Anyone have any experience with this, also, anyone have a code reader so we dont have to limp-it to advance auto! Preesh the help homies.
mallcrawl:
my bet would be the electric fans not spinning, not sure why it would have triggered the check engine light instantly though.
Axle:
Could be a bad thermostat.
CnoteTJ:
i was thinking thermostat, i just want to get more opinions if thats not it and the check engine light is throwing me off
reg:
not to be too obvious, but to my knowledge XJ's have mechnical fans (at least mine did 2000) I had similiar problems. how hot did it get. fluid level good? try pulling the thermo and running it. does it still overheat? I upgraded to this: CSF heavy duty 3-row for $165.
I loved it, never had problems again. Mine would overheat anytime there wasn't air moving over the radiator. I tried everything, but finally it came down to the radiator. EASY INSTALL.
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