I'm kinda in a tough place right now. I have had my check engine light come on. My OBD II bluetooth dongle doesn't work on my car (2004 S Type 4.2, 90k). My brother in law, a mechanic, doesn't have a OBD II diagnostic that will read it either. I'm hoping I could find some "off the cuff" guesses on here.

Sitting in traffic last night, the check engine light came on. The car seemed to be running fine, smooth idle, normal acceleration and cruising the rest of my way home.

This morning, it started up as always, no problems, but the light was still on. Before I pulled out of the garage, I sat a couple moments to start my music stream on my phone to listen to on the way to work. I became aware of a slight whiff of gasoline smell as I sat there. As I drove to work, I caught that faint whiff again, but it was totally gone by the time I got to work (about 9 miles, 40 minutes driving, mostly city streets).

I'm not looking for an expert diagnosis, just some educated guesses. Any help would be appreciated.

Thanks.

 

Various places will read the OBD free, such as AutoZone.

Yours may of course be faulty - check wiring/fuses/etc.

 

Do you drive with the windows cracked? Have you checked the seal on the gas cap.?

First step is go to any major auto parts store and have them put an OBD-II reader on the car. While you are at it, check the gas cap gasket; if faulty, replace it with an OE unit, as aftermarket gas caps for Jags do not enjoy a good reputation here...

JR

 

Thanks, I plan on stopping at a Pep Boys that is on my way home, to check into the OBD II reading ( bought my brakes from them a couple months back).

I had the sunroof vented as I was driving, yesterday, when the light first came on, not this morning though. The gas cap was one of my first checks because I had that happen on my old Eagle Vision TSi. I'm still getting used to that this gas cap doesn't "ratchet" like most do, you just twist until you feel it latch.

 

Make sure to get the actual 5 digit code. It will be a single letter followed by four numbers, such as P0301. Some codes are Jaguar-specific. If they only tell you what their scanner thinks it means, it may not be accurate. The code is the way to go.

 

Okay, stopped at Pep Boys, an older guy in service helped me out. I wish I had gotten his name, he was great to talk to. He worked at a Saab dealer that I remember when I was a kid, back in my old neighborhood.

In any case, his OBD II unit had no problems reading thins. It gave 2 codes:

P0456 - Evaporative system leak.
P1111 - Unknown (he said it is probably a Jaguar code)

He asked if I wanted the codes cleared, I said sure. All the way home, the check engine light never came on again.

Thank you very much JagV8, S-Type Owner and kr98664 for the help.

Edit: Quick Google search told me that P1111 is a check code to say the system is a go.

 

 

I'm surprised the guy cleared the codes for you. I thought they typically weren't allowed to do that. That's good, though. It saves you a little trouble.

I'd suggest just keeping an eye on it. The P0456 means a small leak has been detected in the fuel tank vapor recovery system. I forget the exact details, but a fault at this minor level has to be detected on several drive cycles in a row before the check engine light is illuminated. The logic is to prevent false indications. If the light doesn't come back within the next few days, you're probably good.

If the light does return, don't panic. You'll just have to do a.little troubleshooting. We can walk you through that if needed.

The other code has already been explained. No need to panic there, either.

More details of the codes here:

JagRepair.com - Jaguar Repair Information Resource

 

Here is the exact code as related by Jag:L : P0456. Leak Detected. 20 Thou.

L1 : CHECK FUEL FILLER CAP FITMENT AND CONDITION OF PIPES AND CONNECTORS.

1. Ensure that the fuel filler cap is correctly installed and tightened. (minimum 3 clicks)
2. Check the condition of all accessible pipes and connectors in the vapor line.

Are all pipes and connectors in good condition?Yes
Suspect concern with fuel tank assembly or carbon canister assembly.No REPAIR as necessary. CLEAR the DTC. Carry out a full Evap system monitor drive cycle, recheck DTCs. Tom in Plano/Dallas

 

Update: Its now been over a week since the code has cleared and the check engine light has not returned. Hopefully it was a one time hiccup.

Thank you all for your help.

 

Thank thank you for coming back with the repost of a successful fix