CEL with NO SYMPTOMS OR FLUID LOSS

[Barrett86]

Hey Guys, i have a 99 XLT and today on my way home i got a CEL, i have no losS of power, no leaks, coolant is good,oil good, tranny good, no weird idle, nothing, it acts fine. its really cold here well its cold high 20's at night, i think it came on cuz its cold, but it wont go away, i know i can remove the NEG cable and reset it but i,,a have the reader hooked up to her tomorrow, just wanted to get some insight if you guys had any, oh BTW i bought this thing last friday, the guy already replaced the TPS, and the MAFS(mass-air lol) so im at a losS, i know broncos cuz i own one as well. lol. thanks guys.

 

[ThePhoenix]

sounds like he reset it and then it stayed offuntil it was sold. Could be anythinng..you need teh codes

 

[Barrett86]

System Too Lean.

PROLLY a bad o2 sensor. but last time i had a bad o2 sensor, (on my bronco) it idled funny, so whats up.

 

[storlied]

Hi Chris. =P

 

[marragtop]

You have to pull the codes. Anything else is just guessing. EGR problems will kick the light on and not necessarily cause any change in the way it runs. Get the codes and post them here.

 

[Barrett86]

i did it said SYSTEM TOO LEAN. i dont remember the code, will post when light comes on again

 

[Barrett86]

No Cel Since Then Guys.