Hey guys. I need some guidance here. I have my 01 S-Type with more codes than I care to count. The big issue I am having is that it just runs poorly when I fill the tank full, but as I drive it just somehow gets better. I have two misfire codes, for cylinders 5 and 7, P0420, P0455, P1587 and like a dozen others. But I am most concerned with those ones for now. I am having trouble figuring out which part I may need to get, if these codes are all connected or what exactly is going on. I welcome your advice and suggestions!

 

By not posting the other codes you're really not helping.

What did you do about checking each of the list of causes Jaguar provide for the codes?

 

Also, besides listing the codes, the source of obtaining the codes might also be helpful. Jaguars do store "historical" codes which may, or may not be pertinent to your current problems.

Is the MIL/CEL currently illuminated and has it been flashing?

 

We scanned it with a snap on scanner, wrote the codes down and right now no light is on. We have not driven it since we did that yesterday though. Here are all the codes, including non engine codes...
P0305
P0307
P0420
P0455
P1587
P1588
B1676
B2116
B1309
B1341
B1242
B1342
U1262
B1681
U1131

To be honest, I have not checked the list from Jaguar. I didn't know they had one.

 

One thing is for certain, it appears that at one point your battery voltage may have dipped below the minimum threshold (usually 12.1V) to properly energize a bunch of the systems on the car.

How old is your battery, and have you had it load tested in the immediate past?

I am pretty sure Karl will be along shortly to comment in more detail on your multiple error codes...

 

Battery is about 2 years old, it load tested fine, around 500 CCA. Charging system keeps the voltage right around 13.8.We have had it running a little bit and no codes areback on yet.

 

The codes are all in the workshop manual (free download from here) and also on JagRepair.com - Jaguar Repair Information Resource with all their causes.

There may well be an air leak or "just" the misfires, either will cause bad running (and catalyst damage).

There are a vast number of posts about how to check for air leaks such as via fuel trims.

 

In my opinion you need to focus on the codes from the top down..Fix the misfires. That might be coils..Maybe plugs.

The P0420 sadly implies to be that the bank 2 convertor is already toast from the bank 2 misfires.

With any luck the throttle body codes are a result of a bad battery..

The rest of the codes are Most likely from a bad battery...I'm sure the Battery Police will check in shortly and tell you that your voltage had to have dipped below what these cars like to see.(As S-type Owner pointed out.)

 

@Julia Cameron, what is the voltage across the battery terminals with the ignition in the OFF position when measured with a voltmeter?

Have you located the reason for the misfires on cylinders 5 and 7? The AJ-V8 cylinder numbering scheme is attached.

 

Hi Julia
I was thinking that if the poor running happened after you filled the tank that it might be the fuel.

You could drain the tank and fill with known good premium fuel and give it a good run.

If this doesn't help then it might be in need of a fuel filter and possibly fuel pump. You could test the fuel pressure before you change these parts. The link below at post 4 by NBCat will give you the correct fuel pressure.

https://www.jaguarforums.com/forum/s.../#&gid=1&pid=1

.

 

You guys have a lot of helpful information, I really appreciate it. So far we have not had any lights come back on at all. We have filled the tank up and driven it. All we've done was replace the battery with one that has 1100 CCA, and we bypassed the canister purge valve. It seems to be running better, only felt a couple sputters when it was being driven.

 

Swapping out the battery will have cleared the codes (unless you used a jumper to preserve the codes and settings), some codes will require a few drive cycles to become "pending" and then set to a hard code. If your state requires periodic emissions testing, you are going to eventually have to deal with the purge valve issue...

 

You'll have caused P1000 so see if it changes to P111 soon. If not, investigate. Many codes cannot be flagged until then so you could be in limbo.

 

Change the 2 coils first, battery too. Run codes again after replacing these. Evap has some issues too, but start with a new battery and coils

 

Typo: post #13 should be P1111, not P111.

 

I would clear the codes and see what comes back.

 

This looks like one of those "drive by" posts, as it has been over a year since the OP last updated us on her situation. The problem with multiple code clearings is that you can end up with a car whose monitors will not set and give you the P1111 necessary to get the car ready for emissions testing. We have had a couple of those in the past here on the forum.

 

It's worked for me every time on both x type and the s

 

Can codes be cleared w/o a scanner?

 

Basically:
1. clearing does not fix anything
2. you haven't (yet) been unlucky and found yourself in Catch-22 where monitors can't set so the car can't tell you codes - but as has been posted that is what does occur occasionally