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Unread 04-10-2012, 03:10 PM   #1
me77
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1999 XJ Cherokee 
 
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99 jeep cherokee o2 sensor

My check engine light came on the other day and when we checked it, we got the p0141 code - oxygen sensor heater circuit bank 1 sensor 2. Does this mean my sensor is bad or the circuit involving the sensor has a problem. Also where exactly is the sensor located? I have a regular 99 jeep Cherokee with a 4.0L engine.

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Unread 04-10-2012, 03:18 PM   #2
CJ7-Tim
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2000 XJ Cherokee 
 
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Possible causes
- Rear Heated Oxygen Sensor wire harness is short circuit or open circuit
- Rear Heated Oxygen Sensor wire connector poor electrical connection
- Faulty Rear Heated Oxygen Sensor
- Inappropriate fuel pressure
- Faulty fuel injectors
- Exhaust Manifold leaks
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Unread 04-11-2012, 10:24 PM   #3
Gutz88
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Yea check the wires.. I replaced mine to later find out this was the problem[/IMG]
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Unread 04-11-2012, 10:25 PM   #4
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Unread 04-14-2012, 02:11 PM   #5
Dbiked
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Where were those chafed at? Because I've got both O2 sensor circuits setting off my cel
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Unread 04-14-2012, 09:48 PM   #6
Gutz88
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Thats the front one. I followed it to the top off engine. Thats right before it goes into the (main?) wire harness,,,
Also found that same thing on the wires coming from my MAP sensor..
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