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Tahoenative 10-17-2012 09:49 PM

Pulled 4 codes. Now what?
97 TJ
Pulled four codes this evening but don't understand the lingo enough to know what I need from here. Help is greatly appreciated.

Codes pulled:
P0132 (M) 1/1 O2 Sensor Shorted To Voltage Oxygen sensor input voltage maintained above normal operating range.
P0133 (M) 1/1 O2 Sensor Slow Response Oxygen sensor response slower than minimum required switching frequency.
P0135 (M) 1/1 O2 Sensor Heater Failure Oxygen sensor heater element malfunction.
P0171 (M) 1/1 Fuel System Lean A lean air/fuel mixture has been indicated by an abnormally rich correction factor.

One more question, all of a sudden my fuel gauge only reads 3/4 tank after filling it???

wwch99tj 10-17-2012 09:59 PM

Basically you need to replace the upstream o2 sensors. I suggest NTK brand sensors, you can get them fairly cheap at

kecksnext 10-17-2012 10:03 PM

I believe the 1st three codes are related to a bad oxygen sensor. The 4th code is probably a result of bad readings/malfunction of said oxygen sensor.

Your fuel gauge issue might be the bobber in the tank probably has some crap on it (or is broken) not allowing it to fully float and read full. Not worth the trouble in my opinion but you could drop the tank (after you run it dry) and see for yourself. If you get acurate readings from 3/4 on down I wouldn't be too concerned.

WWCH beat me to it but yeah...what he said.

Tahoenative 10-17-2012 10:27 PM

I haven't pulled my records yet but I replaced the sensors 2-3 years ago. Seems a little too frequent, right? If so, is there something causing these to fail quickly? At that time I also had back pressure in the exhaust system and had to replace the muffler. These things related? If so, how? Thanks again!

Tahoenative 10-17-2012 10:30 PM

noticed you are from la isla del encanto. I lived there for a couple years and picked up Spanish. Love the food! Good jeep trails down there?

kecksnext 10-17-2012 10:49 PM

I wish i could give some insight into the back pressure but that might be symptomatic of something else. It,s definitely too soon to replace the o2 sensors.

As for the island.... Yo encanto!! I moved here with the wife and and gained 30 lbs. Got that in check now. There is everywhere to wheel here, Jeeps are king here plus they love the old samurai,s. People vacation here but never get past the resorts. This place is all mountains and beaches built for Jeeps. We recently set a record for the biggest Jeep get together. If i find it i,ll post a link but it,s probably en espanol lol, where did you live here?

kecksnext 10-17-2012 11:10 PM

This is from 2010 but it's crazy how many Jeeps were together here. If you google you tube and what not you can probably see some vids.

August 2010 Drivelines - 4-Wheel & Off-Road Magazine

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