obd1 codes found
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Elder User
Joined: Oct 2013
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From: Independence
sorry guys dont mean to jump all over the place but to clear the CM codes do i unplug the jumper wire as soon as it starts to flash period? Or do i wait until, it starts to flash the actual codes? And does it matter which side I unplug the jumper wire from? I know this probably sounds stupid, just wanna make sure it's done right. Also should the engine be warm when i do it or no? and it's KOEO right? Thanks guys!!!!
Fleet Owner
Joined: Oct 2005
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From: Kentucky
DTC 83 (KOEO): EGR Control solenoid circuit failure.
DTC 84 (KOEO): EGR Vacuum Solenoid circuit failure.
Code 33 (CM): EGR valve opening not detected.
Code 33 is a symptom of codes 83 and 84. Both indicate the EGR Vacuum Regulator (EVR) is not electrically connected to the computer (PCM). Could be open wires or the EVR solenoid is open.
DTC 84 (KOEO): EGR Vacuum Solenoid circuit failure.
Code 33 (CM): EGR valve opening not detected.
Code 33 is a symptom of codes 83 and 84. Both indicate the EGR Vacuum Regulator (EVR) is not electrically connected to the computer (PCM). Could be open wires or the EVR solenoid is open.
Fleet Owner
Joined: Oct 2005
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From: Kentucky
Some very good information here: Air Charge Temperature
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Elder User
Joined: Oct 2013
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From: Independence
DTC 83 (KOEO): EGR Control solenoid circuit failure.
DTC 84 (KOEO): EGR Vacuum Solenoid circuit failure.
Code 33 (CM): EGR valve opening not detected.
Code 33 is a symptom of codes 83 and 84. Both indicate the EGR Vacuum Regulator (EVR) is not electrically connected to the computer (PCM). Could be open wires or the EVR solenoid is open.
DTC 84 (KOEO): EGR Vacuum Solenoid circuit failure.
Code 33 (CM): EGR valve opening not detected.
Code 33 is a symptom of codes 83 and 84. Both indicate the EGR Vacuum Regulator (EVR) is not electrically connected to the computer (PCM). Could be open wires or the EVR solenoid is open.
Fleet Owner
Joined: Aug 2005
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From: Easton,Ks
Sounds like an open green wire between the EVR solenoid and the Computer or an open switching to ground part (transistor) in the computer.
Also make sure the small black wire with a green stripe has a good ground at the NEG post of the battery.
Also make sure the small black wire with a green stripe has a good ground at the NEG post of the battery.
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Elder User
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From: Independence
ok i will check the wire at the battery neg. post for sure. How would i check the other? Thanks subford for the info on that!
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Elder User
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From: Independence
Should I just delete the EGR valve ive heard its not a good idea but some say you can! Only if i cant figure out whats going on with it! What do any of you think? Just want some honest opinions on this with folks that have more experience than me! Way more oh no emissions test here. And since the Air injection is deleted any way. Thanks again!
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Sounds similar to a problem I have on occasion. I'll turn key on, everything is good, turn to start, nothing...no click, nothing. Tried to jump-start it, nothing.
There is a contact in the starter relay circuit that closes when the automatic is in 'Park' or 'Neutral'. By jiggling the gear shift or going to N, I was able to start it.
I hope this helps...
There is a contact in the starter relay circuit that closes when the automatic is in 'Park' or 'Neutral'. By jiggling the gear shift or going to N, I was able to start it.
I hope this helps...
Fleet Owner
Joined: Oct 2005
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From: Kentucky
Should I just delete the EGR valve ive heard its not a good idea but some say you can! Only if i cant figure out whats going on with it! What do any of you think? Just want some honest opinions on this with folks that have more experience than me! Way more oh no emissions test here. And since the Air injection is deleted any way. Thanks again!
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Elder User
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From: Independence
Whether or not the air injection system is in place or not has no bearing on whether or not you should/can delete the EGR system. While it is possible, I suggest to keep it. Trying to use a resistor to fool the computer has mixed results. You may still end up with a Check Engine Light (Code 33).
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I don't know...my truck runs good with all that stuff. Are you trying to eliminate all the emissions stuff? I understand if you are, but for me, I'm not nearly as mechanically inclined that is needed to get all that stuff out and have the truck running good. I would just assume buy an older truck without a lot of it. The older truck you get, the less emission and smog stuff to deal with...if that's what you're trying to do...
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Elder User
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From: Independence
ok will check that I've done it a long while back with good results at that time maybe something happened since
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Elder User
Joined: Oct 2013
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From: Independence
I don't know...my truck runs good with all that stuff. Are you trying to eliminate all the emissions stuff? I understand if you are, but for me, I'm not nearly as mechanically inclined that is needed to get all that stuff out and have the truck running good. I would just assume buy an older truck without a lot of it. The older truck you get, the less emission and smog stuff to deal with...if that's what you're trying to do...