Ok Need some help check engine
07-27-2010, 11:38 AM
#1
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Year: 2000
Model: Cherokee
Engine: 4.0
Ok Need some help check engine
Ok so gf used jeep and came home said check engine light was on 
ran code it said running to lean (bank 1) Can anyone elaborate this for me on what needs changen lol
ran code it said running to lean (bank 1) Can anyone elaborate this for me on what needs changen lol
07-27-2010, 12:06 PM
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Year: 1997
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Engine: 4.0, comp cam, 99 intake, apn header, neon injectors, Thunderbolt 2.5" High Flow Cat
o2 sensor maybe? sometimes just a tune up can clear that up too.
07-27-2010, 02:46 PM
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thinking its was going to be the fuel injectors or pump.
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07-27-2010, 08:07 PM
#8
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this to yes, bank 1 just means the sensor is reading something wrong so it might now just be that. for me, the sensors dont like mud and water so after wheeling ill usually get a CEL haha
07-28-2010, 05:33 AM
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Year: 1998
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I'm having the same issue.
The P/O recently bought a new pre-cat O2 sensor, since receipt was in glove box. Disconnecting the battery, fixes it, but only temporarily.
The guy at the parts store put a code checker on it & it said it might be the wiring circuit for the pre-cat O2.
I'll tell ya, it does run better with the C/E light lit. It does get some pinging but only after a warm restart, & only for a block or two.
The P/O recently bought a new pre-cat O2 sensor, since receipt was in glove box. Disconnecting the battery, fixes it, but only temporarily.
The guy at the parts store put a code checker on it & it said it might be the wiring circuit for the pre-cat O2.
I'll tell ya, it does run better with the C/E light lit. It does get some pinging but only after a warm restart, & only for a block or two.
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