My 2000 xk8 Check Engine light came on today. I had the codes checked and it read P0307 (cylinder 7 misfire) P1316 then P1111. The Restricted Performance light came on and off twice. The Check Engine light is still on. The car seems to run OK. However, I notice when it starts, it idles a little rough for about 15 seconds then settles down. Also, I've been smelling fuel fumes lately. If I'm not mistaken, P1111 means everything is OK. and if that's the case, is it simply a matter of returning the car to the dealer to have the light turned off?
The car is under warranty and has already been seen to and had a coil replaced in No. 4 cylinder. Thanks

 

P1111 tells you that the tests have completed but doesn't mean that the other codes are irrelevant.

P1316 is a misfire code also, but an emissions one. Probably related to the #7 misfire.

Since you have a warranty, I would take it back to the dealer and have them fix whatever is causing the misfire. Could be another coil, or something as simple as needing plugs.

Fuel fumes should always be taken seriously and if everything is in working order, you shouldn't smell any. It *could* be related to the misfire or it could be something else, but it's worth a check in any case.

 

Thanks - I am returning the car to the dealer. However, he bought it from another dealer, and he too has a warranty. I was hoping to be able to have something of substance for him to use. When I brought the car back a few weeks ago I gave him a print-out from our state emissions station (it failed) which had codes on it. One code indicated No. 4 cylinder was bad and they replaced the coil. Three weeks later, here I go again. I suspect something else is causing this issue - perhaps an injector (?). Having said that, this car has had over $11,000. worth up repairs in the last 2000 miles so I'm hoping what ever it is isn't catastrophic.
Thanks again

 

This car has had more repairs than it is worth! I imagine this dealer was happy to see that baby leave the lot! A 13 year old car can be a liability and this one has proven that it is. I would very careful what you do next.

 

Here is the Jaguar DTC Summary for codes P0307 and P1316 (click on the image to enlarge it):



The 'Possible Causes' are listed in the right hand column.

Nothing unusual or too difficult to troubleshoot but, as others have said, it's the dealer's problem and not yours.

Graham

 

Actually, the dealer bought it at an auction from a fellow who, after buying the car, within a year and a half, dropped all the money into it and decided he wanted a Corvette instead. I have all the receipts and spoke to the shop that performed the work prior to buying the car. The mechanic was in the process of fixing the No. 4 coil (he suspected was an issue because it was a cheap aftermarket supplied by the owner) when the owner got testy, told him to "button it up" he was getting rid of it. The body is in showroom condition, sans a little chip on the front bumper and has a new leather interior. Here's what been done within 2200 miles of when I bought it:
New timing chain tensioners
Water pump
Fuel pump
Thermostat
Plugs
Oil change-filter
New tires
New rotors and pads
Transmission fluid change and filter
New hydraulic top pump and hoses
New performance switch
New throttle body
New windshield and weather strip
New control unit ABS controller
New arm rests
New gear shift ball
New power antenna
New floor mats
New window regulator
New fuel filter

With all that work done, and the fact that the car looks showroom new and drives great, I thought I was on pretty safe ground. We shall see.
Thanks

 

Thank you very much. I'll print that out and give it to the dealer

 

I just took the car out, in Sport Mode, and ran it through the paces. It shot up to 115 in a few seconds shifting about 6K rpm and runs like a Swiss watch. Earlier in the day, when the Restricted Performance light came on, when I gave it the beans, it practically died, until the light went off. Puzzling to say the least. The check engine light is still on and I'm hoping the codes are still recorded. Otherwise, if I told anyone there was a problem, I doubt they'd believe me.

 

Has it been raining in your neck of the woods lately? Small amounts of moisture in the throttle body can sometimes throw misfire codes and cause restricted performance or limp mode as well. When the moisture clears up, the issues often disappear. Just another potential factor to consider....

 

Thanks - It has rained a bit, but I didn't take the car out of the garage.
Yesterday, I returned the car to the dealer (125 mile away - out of state) and on the way, the Check Engine light went out. However, the Restricted Performance light came on and off 25-30 times. Before I left, I took the car to our State's emissions inspections (required for an out-of-state car) where it failed, indicating the same codes mentioned earlier. Why the Check Engine light would go out is a mystery to me. I'm told the error codes still remain in the computer so hopefully, it all can be sorted.

 

That's correct. The codes are stored until the memory is deliberately cleared with a ScanTool. What should be avoided is the dealer just clearing the codes without listing them for you.

Graham

 

Good point. However, I assumed, (and I don't really know the answer to this), that the reason it failed the emissions test was not due to the error code alone, but also because the No. 7 cylinder wasn't firing correctly thereby effecting the emissions. If I'm right, and he simply clears the memory, it still won't pass emissions testing which gives me considerable leverage as it's not legal for a dealer to sell a car that won't pass inspection unless stated in the Bill of Sale that the car is sold "As is". When I bought the car, it came with a six month warranty. As he told me, it's in his best interest to have the car fixed (he has a warranty from the dealer he bought it from), otherwise, he'll have to make good on either the repair or refund my money. I hope I'm on solid ground. Thanks again

 

The dealer I bought the car from sent it to the local Jaguar dealer. I spoke to the service department and they indicated the cam timing was off. He said who ever worked on the car didn't have the right tools (perhaps when the changed the timing chain). He cleaned all the injectors, changed fuel and air filter, put 300 miles on it. Runs great. Not knowing too much about these cars myself, does this make sense to any of you folks?
THanks again

 

You've had a tortuous journey getting this right - good to hear it's running OK now.

I can't see anyone in involved in the chain of responsibility has anything to gain from being anything less than honest in explaining the cause of the issue or what thay have done to rectify it.

The proof will be when you get a P1111 (On Board tests complete) code only and no others pending or stored.

Graham

 

Recap - I got the car back from the dealer. Runs like new. He showed me the bill he received from the Jaguar dealer. He was more than a bit upset at what he had to pay. I'm posting this simply out of curiosity and was wondering what you folks who know far more than I think.
Cylinder#4 misfire - inspect plug and coil found OK and replaced. Cleared codes $405.00
CPJ (I assume hours) 3.00
Reset cam timing and cleaned fuel injection - $2295.00
CPJ 17.00
Test drove 600 miles and charged $204.34 for gas
Parts Amount - 0
Labor Amount 2700.
Misc (Gas) 204.34
Total Charge 2904.34

Labor @ 135.00

Sound right?

 

Someone got ripped off. Thankfully, it doesn't appear to be you.

On the gas - 600 miles at 15 mpg = 40 gallons. $204 / 40 = $5.10 per gallon.

Fifteen mpg is very low. Does premium gas cost $5.10 in your area?

$2700 labor / $135 = 20 hours of labor. Obviously, the labor hours included the time to drive 600 miles.

What's a tech doing driving 600 miles for a test drive?

I would press charges if someone submitted a bill like that to me.

 

1. inspect plug and coil found OK and replaced. Interesting decision to replace parts showing no fault.

2. Reset cam timing and cleaned fuel injection. Probably the timing chain has jumped and they've been very lucky the engine wasn't compromised.

It sounds like you got out of this with a fixed vehicle and no bill. Enjoy it from now on!

Graham