o2 sensor on '95 jeep - Engine ODB2 Fault Codes


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o2 sensor on '95 jeep

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Auto Repair Home>> Automotive Repair>> Engine ODB2 Fault Codes

completelyhis
User

Jan 3, 2008, 9:35 AM

Post #1 of 4 (2412 views)

o2 sensor on '95 jeep	Sign In

My o2 sensor on my '95 jeep keeps faulting. when i hook up the code reader it says something about high voltage something or other (sorry, don't have the code reader with me, and my memory is worthless).

i replaced the sensor, but it keeps happening. any suggestions as to what to look for?

way2old
Veteran / Moderator
way2old profile image

Jan 4, 2008, 5:48 AM

Post #2 of 4 (2405 views)

Re: o2 sensor on '95 jeep	Sign In

See if you can get the exact code numbers and post back. There are too many variables on the O2 sensors. Vacuum leaks, too much fuel, not enough fuel, exhaust leak, exhaust restrictions, MAF or MAP reading wrong, bad wiring, bad connections. These are just a few of the things that can cause an O2 code.

Being way2old is why I need help from younger minds

completelyhis
User

Jan 22, 2008, 8:40 AM

Post #3 of 4 (2373 views)

Re: o2 sensor on '95 jeep	Sign In

The exact code is

21
Oxygen sensor bank 1 position 1 shorted to high voltage

I just replaced this sensor about 2 weeks prior to the code showing up. I notice a foul smell in the exhaust, plus it seems to be putting out a nasty blackness (dang, new muffler and cat. conv too!!)

The check engine light comes on/off intermittantly, the engine runs much worse when the check engine light is on, so I do think it is a "real" problem.

dave284
Enthusiast

Jan 22, 2008, 2:09 PM

Post #4 of 4 (2370 views)

Re: o2 sensor on '95 jeep	Sign In

JUST A NOTE , I HAD A KIA WITH SAME PROBLEM AFTER REPLACING 02 SENSOR THIRD TIME , I REALIZED SOME OF THE AFTER MARKET PARTS DON'T WORK ,THE OEM DID THE TRICK

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