Four codes (P0456, P0442, P0455, P303) & Autozone printout suggesting replace LDP
#1
Newbie
Thread Starter
Join Date: Jan 2019
Posts: 1
Likes: 0
Received 0 Likes
on
0 Posts
Model: Cherokee (XJ)
Four codes (P0456, P0442, P0455, P303) & Autozone printout suggesting replace LDP
I have a Jeep Cherokee 2000 with check engine light. The lights came up about a couple of months ago and I've been too lazy but now the inspection is due. Autozone rep read the codes and the printout suggest I replace Leak Dectection Pump. How reliable is their diagnosis? The 4 codes are
P0456 Evap Emission System Leak Detected (very small leak)
P0442 Evap Emission System Leak Detected (small leak)
P0455 Evap Emission System Leak Detected (gross leak/noflow)
P303 Cylinder 3 Misfire dectected
From what I have read and seen on Youtube, this could be a lot of things other than LDP. And P0303 could be totally something else. Should I trust their computer printout and start with LDP replacement? Any help would be greatly appreciated.
P0456 Evap Emission System Leak Detected (very small leak)
P0442 Evap Emission System Leak Detected (small leak)
P0455 Evap Emission System Leak Detected (gross leak/noflow)
P303 Cylinder 3 Misfire dectected
From what I have read and seen on Youtube, this could be a lot of things other than LDP. And P0303 could be totally something else. Should I trust their computer printout and start with LDP replacement? Any help would be greatly appreciated.
#2
CF Veteran
Join Date: Oct 2015
Posts: 7,357
Likes: 0
Received 1,530 Likes
on
1,173 Posts
Year: 2000
Model: Cherokee (XJ)
Could be one of those things where a problem just snowballs but there really are not additional problems. If time was not an issue and because it is not too expensive if this were me I would throw an new gas cap on, clear all the codes, drive around, and see what happens. Many times with a P0456 that is all it is. I would suggest you take it off and put it back on but you did say this started awhile ago and I am going to assume you have filled up numerous times since the Jeep threw the CEL.
Thread
Thread Starter
Forum
Replies
Last Post
emx72
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
1
09-28-2018 05:43 PM
Offroad49
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
2
05-27-2016 08:48 AM
Mendax13
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
7
12-16-2013 03:54 AM
WantaXJ
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
14
05-03-2013 07:38 PM
oldbill
Stock Grand Cherokee Tech. All ZJ/WJ/WK Non-modified/stock questions go here!
1
11-17-2011 06:51 AM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)