The vehicle must be driven over 50 miles for the monitors to display 'ready'. The DTC P1111 means the monitors are ready, or 'system pass', so it should pass the Smog Check.

 

thanks NBcat. Curious if you have any thoughts on the fuel trims I posted? or Any other advice?

 

LTFTs look hard to grasp but probably OK.

You can read the codes PDF from JTIS for drive cycle info on setting monitors.

Remember every time you clear codes you clear all monitors.

 

Jagv8, thanks. I sure am struggling with this, but from the number of other people on forum on other threads discussing the same stuff, I surmise these lean codes are a common nightmare.

Drove the car some more today, and was gaining confidence that the replaced 02 sensor on bank 2 may have fixed 0174, but then 0174 pending popped up. What does it mean when a code is pending?
Would a faulty evap valve/cannister cause lean code?

Riddle me this....in California, you can pass a smog test with one monitor only incomplete, and only the evap. Here's a dilemma......on the Jag, if any monitor is incomplete, the comprehensive p1000 will not reset to ready either. Thus if I do manage to get the 02 to reset to ready and only the evap is incomplete, I still have a noncompliant smog problem. How do i get around that?

 

Lean codes are typically caused by vacuum leaks, blocked injectors, weak fuel pressure caused by failing fuel pump, or blocked fuel filter.

 

There's no riddle. P1000 is a pending code so not seen by the test station (same as P1111).

However, I think you'll find with an incomplete evap you'll also have the comprehensive incomplete.

 

thanks for responses guys. So regarding fuel flow, I replaced fuel filter with new one. The obd reading for fuel pressure at 2500 rpms is 62.22. What should it be? I checked for vac leaks with a smoke test performed at a service shop and none found.

Jagv8, you are correct in that as long as the evap does not complete, neither will the comprehensive, but just for my benefit, I thought p1000 WAS the code for incomplete comprehensive. On my scan tool, it actually reads as such.

Please help me understand what ANY code means when it is "pending". Does that mean the fault is not permanent, and might remove itself if the computer made the necessary corrections? For instance, as I reported last, 0174 PENDING popped up today but not 0174. What does pending mean exactly with regard to these fault codes?

 

Pending means that a fault has been detected, but has not reappeared over several start/stop cycles.

 

In order for a hard code to come up it must occur 2 times within a given period of time if it only occurs once then it is classified as a temporary code. It means it saw a problem but it was not serious enough for it to set a hard code.

As for the definition of the codes you are getting on your code reader you should ignore its definition. The code reader is compatible with other cars and gives you a generic definition for a code and that will put you off in the wrong direction only use the code definitions for your model year car. See attached.

This link is for 2003 on OBDII codes http://jagrepair.com/images/AutoRepairPhotos/P20003.PDF

When you R&R the O2 did you do it with the battery connected and did you do a hard reset when you were done? If not clear the code and continue to drive and see if it comes up again.

 

You guys are awesome. Thanks for taking the time to help me. Gus, I did not disconnect battery or do hard reset when the 02 bank 2 was changed. I had a local mechanic who I am getting good vibes from and building a trust with, change out the sensor on the rack. I had the new part. He was going to do the install for free, but I threw him $40 for the favor. I don't know how to do a hard reset.

I sent the wife to work with it today which involves freeway with stop and go traffic jams along the way and round trip about 50 miles. She reported that restricted performance came on momentarily but disappeared. I just scanned the car with the ELM and it is showing a 1074 pending but nothing else. Fuel trims still less than +- 10 on short term and long term. Fuel pressure at 66.

I'm trying to keep my hands off it and see if in a couple days the monitors will complete before another hard code appears. Any thoughts appreciated.

 

Fuel trims indicate no vacuum leaks, so continue to drive the vehicle and see if the MIL comes on.

'Hard reset' is achieved by disconnecting the battery and touching the terminals to each other for a few seconds before reconnecting to the battery.

 

Jakesdad, check out this info in emission testing machine newsletter regarding EVAP and CCM codes being a peculiar problem on s-types.

The upshot is testing machines may allow vehicle to pass . . . even with EVAP and CCM incomplete. (See page 2 of newsletter).

I had problem with EVAP and CCM not clearing for many many miles. However, I was under 5,000 miles and emissions exempt in PA. So I didn't have to put it to test. But might be worth a shot.

http://autoservicesystems.net/upload...016_letter.pdf

 

The original is here http://obdclearinghouse.com/index.ph...t_file&id=1418

but the P0174 means there is probably a fault and the letter can be ignored. Certainly you should follow the drive cycle info in any case.

 

Quanticp...Jagv8....that letter is very interesting. If I can get the car down to only evap and comp monitors incomplete, I might take the car to smog station and tell them to run a test even if they think it wont pass due to monitors. I could submit the "failed" test to state referee, along with highlighted letter on this subject and appeal for a special circumstances "pass".

What a quagmire..and it occurs to me that if not for the help of everyone on this forum chiming in, I would have no option to remedy the problem except to continue to pay hourly labor rates to a dealer or other mechanic to hunt and peck for the answer. It would cost thousands of dollars for needle in a haystack search.
Kind of ridiculous. If Jaguar realizes that they may have created an emissions testing nightmare with these monitors, why not do a recall to update the software to change how the monitors are linked, rather than put affected owners thru this?

I will keep my fingers crossed over the weekend that the 02 resets and lean code does not show up.

 

The thing is to fix it so P0174 isn't occurring. It's stopping the monitors, most likely, or the thing causing it is.

It will bite you if unfixed.

 

+1

We are now a long way from post #1 and your model info, maybe it's time to get the info in your signature so that you get accurate help.

 

Interesting indeed. The condition above may be why my car failed emissions test a few years ago. I'll print that letter and keep it in the glove box.

Thanks

 

If you've no actual or pending codes and have good fuel trims then yes could be. (Sorry the letter hasn't been mentioned much. It does seem very rare indeed for it to apply and I've wondered if one of the later PCM software versions fixed it.)

 

Norri, I will get the signature updated. Pretty sure I mentioned this was for 2005 s type 3.0 in op but ok.
Jagv8....yes I agree need to get rid of that 0174 but still mystery. New upstream 02 sensor, smoke tested, fuel trims seem to be ok from feedback here and what I've read online,. I just don't get it. I drove the car with elm hooked up to watch fuel trims and I noticed that both sides short term and long term seem to go positive (long term up to +18) when accelerating, but seem to drop back down to near 0 within a few points once rpms fall off. Is that normal?
Currently showing a pending 0174 but no hard codes other than the p1000. Monitors still not resetting, 02, evap, comp.
I'm thinking might try another more expensive new mafs.? anyone suggest the exact mafs I should install please?
Thanks everyone.

 

Did you follow the drive cycle info?