O2 sensor shorted out PCM? - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep Grand Cherokee & Commander Forums > ZJ Grand Cherokee Forum > O2 sensor shorted out PCM?

Savvy/Currie Aluminum Control ArmsRockridge 4WD IS Taking Zone Offroad Suspension Lift Kits ZONE 4.25" combo lift for TJ available at Rockridge4w

Reply
Unread 01-15-2014, 02:54 PM   #1
ConnorZJ413
Registered User
1998 ZJ 
 
Join Date: May 2013
Location: Wareham, Mass
Posts: 18
O2 sensor shorted out PCM?

I posted earlier on this issue but have broken a little ground. My driveshaft ripped my downstream o2 sensor wires out of the exhaust plug, which resulted in them dragging on the wet ground this morning. My asd relay is good and the o2 harness has suffered a little damage but not much. When I turn it on she crank and cranks with all lights working, dashboard/overhead, but none o my guages work at all, they all sit at 0. Could the wet ground shorted my PCM? Or worse?

ConnorZJ413 is offline   Reply With Quote Quick reply to this message
Unread 01-15-2014, 05:01 PM   #2
Gearhead31
Registered User
1995 ZJ 
 
Join Date: Feb 2012
Location: St Pete, Florida
Posts: 2,055
deleted. Bad info
__________________
1995 ZJ ltd, 4.0 i6, *cough stock cough* 253,xxx and still pumping strong
1998 Chevy Cheyenne K1500, 5.7L Vortec, mostly stock
*In peace, sons bury their fathers. In war, fathers bury their sons. - Herodotus
[QUOTE=JasonStebbins]We can call it the Whoosh King Catalog System. :D[/QUOTE]
Gearhead31 is offline   Reply With Quote Quick reply to this message
Unread 01-15-2014, 11:04 PM   #3
JS97ZJ
Registered User
1997 ZJ 
 
Join Date: Dec 2009
Location: Dingmans Ferry, PA
Posts: 2,043
#20 fuse in the PDC (under the hood fuse box) is probably blown. Make sure the wires are separated before replacing it.
You can drive it without the downstream o2 but it will register a fault code and affect the gas mileage a little.
The downstream mainly monitors the health of the cat.
If the fuse blows again after the you've done the above, your PCM has probably gone bad.
pdc.png

JS97ZJ is offline   Reply With Quote Quick reply to this message
Unread 01-16-2014, 12:09 PM   #4
ConnorZJ413
Registered User
1998 ZJ 
 
Join Date: May 2013
Location: Wareham, Mass
Posts: 18
Yes I checked all fuses and relays. Great info though!!!
ConnorZJ413 is offline   Reply With Quote Quick reply to this message
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.
Note: All free e-mails have been banned due to mis-use. (Yahoo, Gmail, Hotmail, etc.)
Don't have a non-free e-mail address? Click here for a solution: Manual Account Creation
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.


Thread Tools






Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.