post #1 of Old 03-31-2014, 05:56 PM Thread Starter
Evan1989
Registered User
1999 XJ Cherokee 
 
Join Date: Mar 2014
Location: baysid
Posts: 4
P0131- oxygen sensor bad or something else?

Hey all.

I have a 1999 cherokee around 100k miles. CEL displays P0131 which is 02 sensor bank1 sensor 1 voltage low. This sensor is located before catalytic converter.

Since the voltage is low, I believe this means it is running lean which results in too much oxygen being let it in.

At times, the car runs a bit rough at idle.

I have located the sensor but it seems the plug goes up to the engine. My hand cant get in there to unplug it if I wanted to change it. Any Ideas?

Also I just want to know what the other issues can be besides the 02 sensor being faulty.

I do not see enough of the wire to see if there is a short. Where is the connector that goes to the engine compartment located?


Any ideas and experience, I would appreciate.

-Evan


Last edited by Evan1989; 03-31-2014 at 06:07 PM.
Evan1989 is offline  
post #2 of Old 03-31-2014, 06:24 PM
CJ7-Tim
Real Jeeps have dents
 
CJ7-Tim's Avatar
2000 XJ Cherokee 
 
Join Date: Apr 2002
Location: out in the garage - Minneapolis
Posts: 24,419
Either a faulty O2 sensor, O2 sensor wire harness issues, or a cracked exhaust manifold. Cracked exhaust manifolds are very common.

P0131 JEEP O2 Sensor Circuit Low Bank 1 Sensor 1
Symptoms
- Check Engine Light ON
- High Fuel Consumption
- Excessive Smoke from Exhaust
Possible causes
- Faulty Front Heated Oxygen Sensor Bank 1
- Front Heated Oxygen Sensor Bank 1 harness is open or shorted
- Front Heated Oxygen Sensor Bank 1 circuit poor electrical connection
- Faulty fuel injectors
- Intake air leaks
- Exhaust gas leaks

.
Attached Images
 

.

A recent Gallup public opinion poll shows the NRA, at 58% approval, has a higher approval rating than either Hillary Clinton or Barack Obama.

Progressive Liberalism: Bringing you new Healthcare ideas so wonderful, they have to include mandatory participation ...

Originally Posted by Ronald W. Reagan: Government is not the solution to our problems; Government is the problem.
CJ7-Tim is offline  
post #3 of Old 03-31-2014, 10:11 PM Thread Starter
Evan1989
Registered User
1999 XJ Cherokee 
 
Join Date: Mar 2014
Location: baysid
Posts: 4
thanks for the reply.. how would i check if there is a short if I cant even get my hand up enough to disconnect the sensor plug and see any of the other wires? Is there a way to access it from the the hood area
Evan1989 is offline  
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome