wkobe
Senior Member
Posts: 493
Reg: 02-04-04
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04-17-22 03:51 PM - Post#2839938
04 will not ever set emissions readiness but it has no stored or pending codes. The shop my daughter sent it to said ecu is bad so we ordered on that is programmed to the vin but with new ecu we can’t get the pass system to link to the key and it won’t start. When I put old ecu in it starts fine
Thanks wayne
wayne
1996 k1500 4.3 276k miles
1996 k2500 5.7 118k miles
1998 k2500 5.7 115k miles |
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Shepherd
Valued Contributor
Posts: 2555
Loc: Lake George, NY
Reg: 11-11-15
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04-17-22 05:18 PM - Post#2839945
In response to wkobe
Have you done the prescribed drive cycle, which monitor will not come online?
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wkobe
Senior Member
Posts: 493
Reg: 02-04-04
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04-17-22 05:25 PM - Post#2839946
In response to Shepherd
Yes it’s a daily driver so it gets plenty of drive cycles
wayne
1996 k1500 4.3 276k miles
1996 k2500 5.7 118k miles
1998 k2500 5.7 115k miles |
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Shepherd
Valued Contributor
Posts: 2555
Loc: Lake George, NY
Reg: 11-11-15
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04-17-22 05:39 PM - Post#2839948
In response to wkobe
In NY, you are permitted one monitor to show not ready and still pass, the evap monitor is usually the last one to activate, do you know which one is not activating.
Edited by Shepherd on 04-17-22 05:40 PM. Reason for edit: No reason given.
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wkobe
Senior Member
Posts: 493
Reg: 02-04-04
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04-17-22 06:03 PM - Post#2839949
In response to Shepherd
No I have not Checked it in a while
wayne
1996 k1500 4.3 276k miles
1996 k2500 5.7 118k miles
1998 k2500 5.7 115k miles |
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Shepherd
Valued Contributor
Posts: 2555
Loc: Lake George, NY
Reg: 11-11-15
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04-17-22 06:27 PM - Post#2839952
In response to wkobe
Ok, to really help out we need the info on what monitor or monitors are not coming online.
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 someotherguy
Senior Moderator
Posts: 29575
Loc: Texas
Reg: 08-01-03
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04-18-22 06:26 AM - Post#2839983
In response to wkobe
If you've got an android phone, you can spend about $30ish total and have a reasonable degree of functionality using a Bafx Products bluetooth code reader, and Torque Pro app. You can read and clear codes, read sensor data, and there's even a page that specifically shows emissions readiness for each monitor.
Shepherd is on target with the evap system being the toughest one to get to go ready, especially on this generation of trucks.
Start out by filling the gas tank, clear codes, and drive the truck. It shouldn't take too long to get all but the evap system monitor to go ready. The PCM won't run the evap test until the tank gets below 75% full.
See if you can get to that point - if so then you can get it inspected. BEFORE the tank gets down to 75%. If the evap system is the issue, once the PCM runs the test on it, you'll have a code set and will fail inspection.
Repairing the evap system on these trucks is often not straightforward..
Richard
| 06 Silverado ISS / 06 Silverado SS / 06 300C SRT8 |
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wkobe
Senior Member
Posts: 493
Reg: 02-04-04
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04-18-22 06:52 AM - Post#2839986
In response to someotherguy
Thanks yes I have a OBDmx+
wayne
1996 k1500 4.3 276k miles
1996 k2500 5.7 118k miles
1998 k2500 5.7 115k miles |
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 rockfangd
"9th Year" Gold Supporting Member
Posts: 3190
Age: 36
Loc: Utica ny
Reg: 04-13-10
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04-18-22 07:42 PM - Post#2840023
In response to wkobe
I agree. More info will certainly help.
This is more common than most people think.
Please post the monitors that have not set in the time you would think they should.
Evap and catalyst are nearly always the last 2
| Old School GM fan FOREVER |
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 wagonman100
Site Ambassador
Posts: 15590
Loc: Baltimore, MD
Reg: 11-27-04
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04-20-22 07:03 PM - Post#2840114
In response to rockfangd
I did as Richard said. My truck was setting a P0442 code, small evap. leak after changing my fuel pump. I cleared to code and it would come back at 3/4 tank, 1/2 tank, etc. so I cleared to code and kept the tank full until I got through emissions. The code on mine has since  stopped showing up. Good thing because my code reader took a walk at work one day.
Jay
Friends don’t let friends drive Fords.
1999 Silverado Z71 4X4 extra-cab short bed
1983 Malibu Fauxmad - tubbed
1978 El Camino Kustomized
1972 Monte Carlo
1957 210 handyman wagon
1957 Nomad sport wagon
1957 Cameo Carrier |
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Shepherd
Valued Contributor
Posts: 2555
Loc: Lake George, NY
Reg: 11-11-15
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04-21-22 03:28 PM - Post#2840161
In response to wagonman100
Good, that system is only tested at a range between 1/4 and 3/4 tank capacity.
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Smitty_Chevy
Frequent Contributor
Posts: 1182
Age: 72
Loc: Hampton, GA
Reg: 10-29-08
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04-28-22 12:16 PM - Post#2840413
In response to wkobe
Well we all need to be driving electric cars and trucks 'cause we know they're clean and green. 
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