P0202, p0303 - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > TJ Jeep Wrangler Forum > TJ Tech Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 09-20-2010, 12:04 PM   #1
Newb
 
Join Date: Sep 2010
Location: Tuscaloosa, AL
Posts: 13
Images: 1
P0202, p0303

Hello. I'm a new Jeep owner. Shortly after getting it I get the codes listed above. I put in new plugs and the codes went away . . . for a couple weeks. Now they are back. Unfortunately, I am not a fix-it-yourself kind of guy. Is this dangerous to drive with? Is there anything I can do to try and fix easily or do I need to bring it in? Thanks!

sglisson is offline   Quote Quick Reply
Old 09-20-2010, 12:11 PM   #2
Jeeper
 
T2000J's Avatar
 
Join Date: Sep 2010
Location: PA
Posts: 892
I had the same problem I changed plugs, wire's ,cap rotar and coil It runs real good now good as a 2.5 can get ..
Think I had $60 total in it . Make sure you check the gaps on plugs they say preset but I find most times they are not ..

T2000J is offline   Quote Quick Reply
Old 02-06-2011, 10:43 AM   #3
Newb
 
Join Date: Feb 2011
Posts: 9
My jeep giving the same 0202 and 0203 codes. Also a cylinder 2 misfire. Had the jeep for month or so and it ran fine until I changed the cap/rotor/wires/plugs. Im wondering if these parts cause the code and maybe we need to use oem parts?
Steves98TJ is offline   Quote Quick Reply
Old 02-14-2011, 08:19 AM   #4
Newb
 
Join Date: Feb 2011
Posts: 9
Got it fixed. Turned out to be a broken ground on the #2 injector. The mechanic explained that in this scenario the ECM will tell the injector to stay open all the time. When it was running I could actually smell gas so strong. Another weird side effect of this injector staying open was fuel leaking out through the intake gasket onto the exhaust manifold. I saw fluid there and thought it was coolant caused by a blown head gasket (which is why I took it to a mechanic). The mechanic ran a new ground to the injector from the ECM and all is good.

On the 2.5L the injector harness runs around the back of the valve cover to the ECM. There is a threaded post sticking straight up for something. After years and years the harness falls onto the post and slowly chafes until it breaks through. It could have grounded any wire in the harness, but I got the lucky one! He pulled the harness on top of the valve cover and zip tied it to the throttle cable so it wont happen again.

If you have a code reader it a good place to start. The mechanics have a much better one and it took them a few hours at that.

Also, I replaced the TPS as recommended by several posters and it did nothing. No problem though, it was cheap and helped me prevent another problem down the road. I took off the throttle body and cleaned it thoroughly with sea foam cleaner and a toothbrush (make sure you remove all electronics before cleaning...TPS, IAC, MAP). While your at it give the IAC a good cleaning.

Hope this helps!
Steves98TJ is offline   Quote Quick Reply
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Jeep Wrangler Forum 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 email address for yourself.
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

Posting Rules
You may post new threads
You may 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 Off
Refbacks are Off




Download our Mobile App

» Featured Product

All times are GMT -5. The time now is 06:45 AM.



Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC