As there seems to be a fault, whether EGR-related or not, it's unlikely to set P1111. Instead it wants the fault fixed. More driving isn't a fix.

 

Been reading this thread and I had the same problem of P1111 not setting but mine was due to 02 sensor continuous loop incomplete or something similar to that,I know it's not the same as yours.
Had the yearly M.O.T. and I was so pleased the car passed the M.O.T. with no problems I checked the Torque App on my way home and the P1111 had set after months of having P1000,I can only assume it was because of the emissions test which is incorporated with the M.O.T,have inserted a copy of test,it shows the procedure ie fast idle at 2500/3000 rpm and natural idle for a time of 4 mins,



JagV8 might know times for each test but I seem to remember it was at fast idle for sometime.
Might be worth a try you never know,stranger things have happened.
I'm no expert just thought it might help.
Good luck and hope you get it sorted.
Take Care
Andy

 

The idea is to make sure the cats (& O2s) are hot as they don't necessarily work properly otherwise.

There's a longer version for the MoT if it fails the simple one (which passed) - basically gets them hotter still by longer high revving.

 

alas no, but ive a year to get it fixed. Another warning light came on recently, went off, a day later. I think Don may be right, that egr valve may be problem. Hopefully not the computer.
Did you hard reset via battery?

 

Yes, I did a hard reset since my last post, took the car for a drive, and besides the P1000, a P0171 - "Powertrain System too Lean (Bank 1)" shows up now. I am no expert, but perhaps the guys who commented earlier about vacuum leaks may have been right; and I too am suspicious of the EGR.

My next move is to get a smoke test done on it and see if anything turns up. I will post the results.

 

I await with great interest.
I finally had a proper code show up, P1647, which is 02 heat sensor. Im not sure that explains the particular readings we had before, but i did see elsewhere that it can affect the richness of the gas.
ill check it out soon, doesnt seem to be a rush job.

 

Fix it fast before you need a cat as well.

 

Charles,

I had P1649 pop up during my diagnosis of a non-resolving P1000 and I determined it was just a spurious code (see post #23 in this thread). Since P1647 is more likely to be caused by a problem with the HO2S wiring (e.g. a corroded electrical connector or ground point) than a failed sensor, you might try clearing the code to see if it recurs.

You can perform basic tests on the HO2S wiring with an volt/ohmmeter to check for a short to ground, short to high voltage, open circuit, or high resistance in the circuit. You can also check Live Data with Torque Pro to watch how the HO2S behaves compared to its counterpart in Bank 1. Here's a snip from the DTC Summaries manual:



Cheers,

Don

 

You can hope, but I'd expect a bad sensor.

 

The X308 DTC Summaries Guide and Workshop Manual don't even list P1647, so it's possible that code was not even implemented on the X308. I won't be surprised if Charles' occurrence was spurious (like the P1649 I had that has never recurred since cleared).

If the code recurs, the basic diagnostics are not difficult. There are plenty of reports from folks who replaced an O2S without resolving their issue, so it makes sense to rule out wiring issues since those are the possible causes listed first in the DTC Summaries guide and Workshop Manual pinpoint tests.

The X308 Workshop Manual offers no info on P1647, but the X350 Workshop Manual has pinpoint tests that begin with testing the O2S heater supply voltage, checking for high resistance in other circuits, and so on. See page 2477 of the Powertrain section.

Cheers,

Don

 

I appreciate all your input, which makes an impossiible diagnosis a hopeful one.

The code reoccurred. Id reset, but it actually came on at the turn of the ignition on the next trip.

Don are you saying that the code is completely artificial? or that it may be wiring rather than sensor. If the code was not even implemented with the X308 series, why would cleaning the wires be effective? So i presume it has real bearing with the xkr.

It may well be that in the end the sensor is the problem, but i don' t lose anything by following the steps in the chart you posted. So ill hope, like Jag v8 says!

Ill keep posted. This is going to my local mechanic with your instructions!

I dont like coincidence though so im still wondering if it could also tie in to the persistent P1000 and the gas mix as id read somewhere else.

Tx, J

 

Hi Charles,

I forgot yours is an XKR (X100), but the same DTC Summaries guides apply. I'm not saying that P1647 definitely was not implemented on the X100/X308, but it is possible that it wasn't, since it doesn't appear in the Jaguar DTC guides until around 2004 (e.g. JTP 10371). It might be worth scanning with a different scanner just to see if it also interprets P1647 and not some other code.

P1000 may not resolve to P1111 if any pending DTCs are present, and the air-fuel ratio will definitely be affected if there is any malfunction with an O2S or its electrical circuit. I am not saying that your problem is definitely in the wiring rather than the sensor itself, but the DTC Summaries and Workshop Manual clearly indicate that the wiring is the first suspect. As I mentioned earlier, corrosion on an electrical connector or ground point are the easiest things to check. The sensor heaters are all grounded through the O2S Heaters Relay (in the Control Module Relays enclosure on the right side of the engine bay) and the associated ground point which is nearby in the right hand engine bay enclosure. It would be worth cleaning the relay socket terminals and spade terminals as well as the ground point components. You can also test the relay for proper operation. For details see the Electrical Guide, which you can download here:

X100 Electrical Guide 2001

Cheers,

Don

 

I have read DTCs from Jaguars that did not appear in the DTC guide but had the fault listed in the WDS/IDS window. The fault and possible causes were listed even though it did not appear in any published material. When I worked at the dealer I could always call Jaguar Technical Hotline for additional info but.................That was YEARS AGO.

bob

 

Sometimes Jaguar changed the PCM software and tools like WDS & IDS would update to it, but it seems not every new code was widely documented (if at all).

By way of example, P1647 is in some Jaguar DENSO doc but not in other doc, yet seems to flag on lots of the cars, whether in the doc or not.

My feeling is it's the same underlying software but some of the doc got left as-is (or we've not got copies of the revised version(s)!).

I expect Jaguar took the view that if WDS/IDS report it and describe it then that is what matters and other supporting doc doesn't.

 

so an update.

went to car mechanic who deals often with old cars including jags.

P1647 indicates o2 sensors, but thats not the problem. Checked electricals couldn't see anything. He is baffled, and can only suggest going to main jag dealer (uuugh). Im wondering if this is all false , but jag v8 points to real codes.

 

Charles,

Did your mechanic check the O2S heaters relay for proper operation, and the relay and socket terminals and ground point for looseness or corrosion? If he knows how to test electrical circuits, he could measure for high resistance in the various parts of the O2S circuits.

Cheers,

Don