It doesn't have trims or which pending codes (should have either P1000 or P1111 at least).

 

P1000 currently but the Restricted Performance message just came back. I'll post freeze frame data shortly...

 

General info



General info pt 2



Codes



Codes pt 2



freeze frame data



Freeze frame data



Data at idle



Data at 2500 RPM

Well guys, on the way home today, my MIL came on again. When I got home, I took the above pictures of data from my laptop using my scan tool (OBDCOM) So here it is, any help is appreciated!

 

If you didn't clear things before the last 2 pics then you don't have a typical air leak.

So you're looking at some other cause of lean codes - both sides look about as bad as each other.

The clue may be the monitors (called self-tests in the pics for some bizarre reason) that have failed to set. EVAP looks a real worry.

Possibly MAF, though.

 

I took idle and 2500 rpm readings before I cleared the codes.

Going to replace MAF and see what happens....

 

"Going to replace MAF and see what happens...."


Please let us know if this fixes the problem... I did suggest it at the start of this thread...

 

Yes Donna I did remember your suggestion, however I wanted to exhaust all possibilities of an actual vacuum leak first. Kind of like the "is it plugged in" approach, and then work backwards....

I'd rather replace a hose or fitting first vs a MAF sensor.

I did what you suggested. I purchased a cheap MAF from an auto supply chain store and it will be my test piece. If it fixes it, I'll then go out and get an OEM or suitable permanent replacement.

Cleared codes and installed MAF today, now we'll wait and see...

Strange I noticed on the Self Tests Failed or Not Supported column it added Oxygen Sensor to the other two on the list from the above pictures, Component Monitoring and Evaporative System.

 

Update: 117 miles after installing the new MAF, and still no MIL yet. ( Installed new MAF on Wednesday, 18 Jan and cleared MIL)

Checked with scantool, stil P1000, but so far so good, we'll see, looks like the MAF was the culprit so far....

 

Look to see which OBD monitors have not set as they probably all should have by now. Also look for pending codes besides P1000.

Oh, and that is IS going CL (closed loop).

 

Only code shown pending was P1000

I'll have to look into which OBD monitors were not reset yet. I think its under Self Tests Failed or Not Completed: Component Monitoring, Evaporative System, Oxygen Sensor.

Definitely in closed loop when I check hot, but what do you mean by "IS"?

 

Emphasis.

Monitors that do not set fairly quickly can be that the driving is not varied enough, that you're at an extreme altitude (apparently not you) or that a fault is blocking one or more. The latter can be tough to figure as many codes can't flag if the monitors are not set (it's why you're supposed never to clear codes). Fortunately this codes Catch-22 is fairly rare...

 

So when a MIL appears, read code, fix problem, and OBDII will eventually clear the code itself and turn the MIL off?

If so, I never knew that.

I have to take the battery out today to dry out the small lake in the boot, its been raining here lately with more to follow.

How will that affect my readiness? Starting all over again I suppose?

 

Yes, if fixed they self-clear after 3 more warm ups (sooner for some).

You'll clear everything learned by the PCM such as fuel trims and OBD status.

 

UPDATE: 275 miles after replacing MAF sensor, and no MIL codes since, it looks like the cause of the P0171 & P0174 codes was a bad MAF sensor!

Have to check soon, but since yesterday the OBDII was still at code P1000, no P1111 yet. EVAP system and 02's not ready yet...

 

If no P1111 then it's in doubt what is/was wrong.

 

In previous weeks, I would clear the MIL, try a fix,and the MIL would come back on with same lean codes well under 275 miles, more like 100 or under.

Since I have 275 miles on the car since the MAF changeout, I would say its unofficially fixed, P1111 or P1000

 

Something is preventing the O2 monitor from running/completing. That would be a big concern. O2 monitor is usually the first monitor to complete after only the first or second drive cycle.

Evap hardest to set especially the fact ambient temp needs to be above 40 deg F, (it's winter up here) cold start (engine off for at least 8 hrs) & fuel level between 1/4 & 3/4 tank.

Must drive at a steady speed (highway for anywhere between 7 - 20 minutes)

 

Well, I spoke too soon... looks like I have this coolant leak now....

Oh, and BTW, 967 miles since the MAF replace/MIL reset and yes.... still at P1000! Component monitoring, evaporative system not ready. Oxygen sensors finally were ready.

 

JTIS lists all the various drive-cycles.....you could methodically work your way through them all. I seem to recall the lean codes require 10 min at idle once engine has reached operating temperature to be assured they're gone, but I may have that wrong..

 

The drive cycle is sometimes very hard to complete all the monitors. You might want to print out Jaguar's recommended drive cycle procedure. It's a bit involved and I just used it last month. Took about 1 1/2 hours of following instructions.
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