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1999 Jeep Cherokee

Tiny
MSMCAND
  • MEMBER
  • 1999 JEEP CHEROKEE
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 14,900 MILES
Just replaced 02 sensors for the 2nd time. !St time with bosch brand from auto zone, 2nd time with jeep parts thinking something with heat sleeves.
same thing, check engine light came on again within 20 miles. Same codes each time. My mechanics don't know what else. Hoping you have an answer.
Thanks so much.
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Monday, January 19th, 2009 AT 9:28 AM

3 Replies

Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
What was code P0xxx? Did you replace both banks?
Have they check for vacuum leaks or leaking injector. Alsoexhaust leak before CAT will set code.
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Monday, January 19th, 2009 AT 9:45 AM
Tiny
MSMCAND
  • MEMBER
  • 2 POSTS
Thanks, I will ask the shop to be sure they cleared the code, and they did replace both sensors for the second time.
Afer the bosch sensors were put in the codes still read p135 1/1 02 heater failure; p-141 1/2 02 sesor heater failure; and po-138 1/2 02 senor shorted to voltage.
I added fuel injector cleaner today, "lucas brand", heard it's better than gunout.
It was misfiring and idlin really rough. The idle is better now, and the as mileage has improved, but the light is still on for check engine.
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Monday, January 19th, 2009 AT 5:58 PM
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
O.K. Keep me posted off line couple days but back on now.
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Wednesday, January 21st, 2009 AT 3:58 PM

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