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Working on a 98 ford explorer, had a lower intake leak causing a P0171-0174. Repaired that and reset PCM. Now this is what I am getting:
Have tried replacing the O2’s checked continuity on the wires have heater voltage and grounds also have signals at the PCM(back probed)inspected plugs sockets. Have even swapped out the PCM(and reprogramed the PATS to make it work).
Out of ideas so any suggestions would be great. Car runs great but can not get it to clear the readiness monitors for it to be smog tested.
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I would maybe clean MAF from those readings. How long have you driven since resetting ecm? You’re just trying to get monitors to clear? You’ll need to take a little drive probably just a run up interstate and back may do it. You have to let ecm see that certain parameters have been met for monitors to clear.
Have cleaned the MAF with MAF cleaner and have driven it all over town(surface and interstate). Looked up drive-cycle info and ran thru them as completed as possible.
Hmmmm, what state do you live in? Most allow for so many monitors to be incomplete depending upon she of vehicle. I believe, but may be wrong, that prior to 2005 you are allowed 3. You may not have driven enough for all to pass.
Nevada, and like I said I went thru all the req it calls for on fords drive-cycles. I am telling you it has me banging my head on the hood latch. Overall drive time around 2 hours
LOL I’d google if and how many monitors they allow open. And as bad as it pains me to say maybe a little drive more 🙂
Yes I will take it home with me and drive it over the weekend to see if it ever starts to moniter or if it sets any codes Thanks and if anyone else has come across this issue please speak up.
I found this in the
Nevada State DMV 1G Inspectors Guidebook1996 through 2000 year model vehicles are allowed 2 unset readiness monitors.
2001 to present model year vehicles are allowed 1 unset readiness monitor.
If the maximum number of unset monitors allowed is two and the number of unset monitors is zero the vehicle test passes this portion.
If maximum number of unset readiness monitors allowed is two. The number of unset readiness monitors stored in the PCM is four the vehicle will be rejected.
The vehicle must be driven, under varying driving conditions, for three to seven days to allow the on board computer to run the readiness monitors to completion.
The vehicle must then be retested.
If the readiness monitors still have not run the vehicle must be repaired.
A drive cycle guide of the model specific drive cycle, will be made available to the customer at the Emission Lab.Hope you’re having some better luck with the monster. I’m lucky here in TN no inspection no emissions but I’m close to VA and I have a few customers that like me so I’ve been drove crazy like you at times. Hopefully it’ll clear or set a code this weekend, let me know what happens.
Well I drove the hell out of it today(all around Lake Tahoe). And normally it is a beautiful drive but with the snow and severely high winds today, it was more of a adventure and a challenge just to stay on the road. And in the end the last 2 monitors never did set and it still didn’t set any codes(active or pending). So since Nevada allows 2 non-set monitors to be acceptable I think I’ll just let it fly for now and advise the customer of the issue. And as bad as it sounds to wish for I do wish it would develop into a issue that might give a little better image of where to look for the solution. But for now there are no codes and the car runs great, so I guess it is just wait and see for now because I have no clue where to go at the moment. I have checked everything I can think of and even more. Thanks for your help and will update if anything changes.
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