First, I want to thank everyone for the help and advice on the injector /plug change. But after all that, I still have these codes.

1/13 U0447. Invalid data received from gateway A (Pending)
2/13. U0447. Invalid data received from gateway A (Pending)
3/1$. P0300. Random. Multiple misfire detected. (Pending)
4/13. P0305. Cylinder 5 misfire Detected (Pending)
5/13. P0306. Cylinder 6 misfire Detected. (Pending)
6/13. P1315. No DTC definition found see service manual. (Pending)
7/13. P0307. Cylinder 7 misfire Detected (Pending)
8/13 P0308. Cylinder 8 misfire Detected (Pending)
9/13. P0430 Catalyst System effeciency below threshold Bank 2. (Permanent)
10/13 P0300 Random multiple misfire detected. (Permanent)
11/13 P1315 No DTC definition found . See service manual. (Permanent)
12/13 P0307 cylinder 7 misfire detected (Permanent)
13/13 p0308. Cylinder 8 misfire detected. (Permanent)

I have double checked the connections, thought about changing ignition coils, I’ve lost faith in my ability to repair this, so I’ve decided to take it in for repair. Given theses codes, any idea of what’s going on, so I know what to expect from the dealer? Should I take it to the dealer or an Indy? 2014 SV8 , 48,000 miles. Yes I’m frustrated, this has been going on for almost 2 months now.

 

I have to ask what will seem an irrelevant question: is the battery definitely fully charged? Have you erased the codes?

 

thanks for responding,I have considered the battery as a problem, just by the nature of the codes. However it does appear to be fully charged. I have erased the codes, those showing as permanent will not erase. Soon after I crank the car a variation of codes will appear , mostly the ones I have listed. I get an occasional invalid data gateway B code.

 

Have you tried to reseat the cable to the Gateway module or even replace it? The module is around $120 used on eBay.

 

Does the behaviour of the engine sound like the codes are actually 'real'? i.e is it really misfing?

 

if the misfire codes only come up after the engine gets some significant load I would expect
clogged catalytic converters at least on bank 2 most probably on both sides.
Especially cylinders 6 and 8 which are fired one after another (ISO fireorder 1-2-7-3-4-5-6-8)
located on the same bank are prone to misfire with clogged cats.

Regards
Ulrich

 

At Idle, I have codes, but no CEL. On load the CEL FLASHES. The car runs very rough especially at idle! Idles down at about 600 rpm and sounds awful.

My original problem in July was a CEL P0430. An Indy garage told me it was a bad cat , under warranty and to take it to the dealer. The dealer said the cat was fine, the car was fine. They cleared the codes and sent me on my way. 2 days later I got 22 codes. Dealer said it needed new plugs and injectors. I changed those myself but still get these codes. It is my belief that the cat is bad, but not the dealer. I may take it to another dealer and see what they sau. Problem is now I may just be throwing money out of the window for no reason!

 

Any possibility that the issues are caused by carbon buildup on the intake valves? A good number of the issues/codes could be caused by that.

 

The flashing CEL is an indication of potential damage to the cat, you don't want to continue to drive in that condition.

 

MadScott,
I can say Batteries on these high electronic cars are an enigma.
The wife's CTS Coupe started having issues needing a jump after it sit for a while.. yea, battery was more than 4 years old, that thing has as many or more electronic items as the F Type. I bought a brand new Yellow Top for it.. 3 weeks later, issue came back and now more electronic issues... this goes on for 3 weeks.. I call and get the Optima Yellow Top replaced... made sure it was topped off with charge before I put it in... BOOM.. Zero issues on the codes, weird issues and battery drain..

Seems you have more than just a battery issue, like Cats maybe.. but Defiantly would consider a new high-end battery also. Charge it up out of the car, replace and hopefully much of your issues will go away.

 

It may well be a battery, It has a date with another Jag dealership, Jaguar of North Atlanta on Wednesday the 9th. Thats about 65 miles from my house, so it will be floated. The tires have spent more time on a transport than on asphalt the last 2 months.
I went out this morning , I haven’t touched it for 3 days, turned the switch on, erased all codes. Started it up the CEL was off, and the car ran a lot better. I decided to ease it out of the driveway and around the block. CEL was still off , . So I drive it around for about 10 minutes, getting it up to 55 but no hard acceleration. Brought it back to the driveway, turned it off m checked the codes and the only code is a P0430 Cat bank2 below threshold. That was the original code way back in mid July. The car is running better , but not perfect. The exhaust sound is different, a little muffled , and there is still a slight shaking at idle . The change in the exhaust was also one of my original complaints at the first dealership. The exhaust doesn’t sound as crisp. I’m really thinking a bad cat, and maybe some electrical issues, perhaps battery. I’m ordering all new ignition coils and still plan to remove the plugs on 45678 and borescope the cylinders before it goes to the dealer. Any explanation on the cleared misfire codes?

 

It sounds like you are chasing your tail around a dead cat. Get that 430 code resolved and the rest may never reappear.

 

8.3.0
Do you have an infared thermometer that you can check the temp before and after the cat. Someone correct me if I'm wrong, but one sign of a clogged cat would be significantly lower temps after the cat vs before.

 

Several of these codes could be caused by low fuel pressure, causing lean fuel mixture. I'd also have the fuel pressure tested.