Chabada15

ok, im a newbie on this forum but have been on online forums for years, ive searched thru multiple websites, multiple forums, and the factory service manual,

this is my third jeep
i had a 93 2 door cherokee, a 98 grand cherokee, and now i have a 1996 cherokee 4 door...here's my problem
my truck recently threw a check engine light, when i pulled the codes i got

P0132 - O2 sensor circuit High Volts Bank 1 Sensor 1
P0135 - O2 Heater circuit Malfunction Bank 1 Sensor 1
P0141 - O2 sensor circuit High Volts Bank 1 Sensor 2
P0138 - O2 Heater circuit Malfunction Bank 1 Sensor 2 (PENDING)


now...i replaced both sensors with BOSCH direct fit replacements which i picked up at my local autoparts store, there is no visible damage to the harness anywhere that i can see, neither did it contact the driveline in the rear, i also checked the unmarked fuses under the hood on the passenger side of the truck and all fuses are good, just to be sure i also checked for popped fuses inside the interior fuse box, all of those were also good...

the truck will warm up, when my temp gauge gets about 1/4 of the way up the idle will be slightly rough almost having a patterned lope, once its fully warmed it does not do this, also if i drive the truck before it is 100% up to temperature i will sometimes (not every time but 50% i would say) get a stumble in acceleration, if i pump throttle i can sometimes gas thru this, if i put into neutral the engine revs fine, once i put back into drive it will do this again, once up to temp this does not happen, it does sometimes stumble coming to a stop again when not up to full temperature.

im going to attempt clean the Idle Air Control Valve today, but anyone with any help would be a god send at this point, since i need to get the truck re-inspected

thanks in advance
-Charlie

freegdr

did ya clear and recheck for codes

hankthetank

Continuity in o2 circuit...? Most guys don't use Bosch on their 4.0's anyways, NTK.

SeriousOffroad

Did ya check the O2 Sensor fuse in the junction box?

Chabada15

all fuses are good, yes i checked the 15A fuses

how do i check continuety in the O2 circuit?

Chabada15

is this the problem? and what sensor DO they use?

Chabada15

cleared, came back same codes

Chabada15

can any OG cherokee guys point me in the right direction with this? it seems O2 sensors and this truck disagree all the time, gunna clean the IAC valve tonight

19942doorHO

do you have an exhaust leak?? that could cause the codes, and honestly id return the bosch parts they are for foreign cars ONLY and get something else, bad o2 sensors the rear in particular can cause a vehicle not to run lmao

xjsnake

Don't tell my driveway full of Fords, Chryslers and GM's that...

Chabada15

thanks for the help, what does everyone recommend for a good replacement O2 sensor for the 4.0L HO motor, bosch never did me wrong in the past but if they dont work for these trucks then they dont work, i do not have an exhaust leak, i just want to get rid of these codes, what brand sensors should i go with?

sam24th

Ive never had an issue with bosch parts on my jeep. I usually have issues when I dont run bosch parts like when it came to the fuel pump. I know most guys prefer the NGK brand o2 sensors on the later models. But saying bosche parts only belong on imports is bad advice if you ask me.

19942doorHO

not trying to be a pain but this is coming from a 8 year vet with over 30k in tools alone( head mechanic/ ***. auto science, daimler chrysler internship grad), the word around the entire industry is bosch is crap and not to put it on american vehicles, i reccomend it on german cars lol because they come stock with bosch parts. and id only put coppers in my cyl head

19942doorHO

if youve got the coin go with dealer parts, they really are far superior

Chabada15

ok so i had to wait a week due to $$$ or lack there of lol but i bought both sensors from the dealership, ill update if the light goes out, but i did change the fuel filter and regap the plugs and while the whole engine is smoother the problem persists and the light is still on

updates to come