Need Help - 2 Codes
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Senior User
Joined: Jul 2007
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From: Montreal, Canada
Need Help - 2 Codes
Wife drove the truck last weekend - ya I know, mistake #1
Anyhow, she said the check engine light came on. When I started it, all seemed fine and no CEL. Pulled 2 codes today:
33 - EGR valve opening not detected
172 - HEGO Sensor circuit indicates system lean (right side)
I have a hairline crack on drivers side exhaust manifold and am thinking this may be related to 172.
Can anyone help me figure out what the problems are?
Thanks
Itch
Anyhow, she said the check engine light came on. When I started it, all seemed fine and no CEL. Pulled 2 codes today:
33 - EGR valve opening not detected
172 - HEGO Sensor circuit indicates system lean (right side)
I have a hairline crack on drivers side exhaust manifold and am thinking this may be related to 172.
Can anyone help me figure out what the problems are?
Thanks
Itch
Last edited by Itch71; Sep 11, 2007 at 02:43 PM.
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From: Boyd,TX
It means your EGR valve is not opening or the EVP is out#33.
How old are your O2 sensors? If more than 2 or 3 yrs. they may need to be changed#172.
That should clear it up. This website can give you a better understanding.
www.fordfuelinjection.com
How old are your O2 sensors? If more than 2 or 3 yrs. they may need to be changed#172.
That should clear it up. This website can give you a better understanding.
www.fordfuelinjection.com
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From: Montreal, Canada
Thanks radialarm. Is there anyway to figure out if the EGR valve or the EVP sensor is the culprit? Does a new valve come with a sensor?
As far as the O2 sensors go, I'm not sure if they've ever been replaced. I got this truck 3 months ago. Where are the sensors located?
As far as the O2 sensors go, I'm not sure if they've ever been replaced. I got this truck 3 months ago. Where are the sensors located?
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From: Boyd,TX
My manuals procedure is pretty involved IE it would take forever to copy it all. I am sure someone posted about this not long ago try a search and see what comes up. (I think there is an easier way to test them than my book describes). I didn't see the part about the cracked manifold before. Is it leaking? You can get those at a wrecking yard cheap. It could warp a valve this Winter if it lets in cold air. I let one go once until a section of it fell out, I took it off and it was in three pieces.
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Joined: May 2007
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From: Solon, Ohio
Before you throw away a lot of money on sensors and EGR components, study the stuff about them on fuelinjection.com. You also should buy a Haynes "Ford Pick-ups & Bronco '80 thru 96' "
The Haynes has a testing sequence and proceedure for the EGR system. Many times it's a bad connection or a vacuum leak.
The Haynes has a testing sequence and proceedure for the EGR system. Many times it's a bad connection or a vacuum leak.
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From: Lakewood, Ohio
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From: youngstown ohio
33 code shouldnt even set off the cel, or maybe im wrong, i got code 33 when i didnt have vac hose hooked up to egr never set off the lite, but my bad 02 sure did! p.o welded in the o2 sensor and must have fried it doing it! welded a bung on my collector and havent had lite since
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From: Solon, Ohio
Originally Posted by albung
33 code shouldnt even set off the cel, or maybe im wrong, i got code 33 when i didnt have vac hose hooked up to egr never set off the lite, but my bad 02 sure did! p.o welded in the o2 sensor and must have fried it doing it! welded a bung on my collector and havent had lite since
When I bought my truck had clipped O2 wires because PO had swapped manifold pipes from junkyard and never hooked it up. I spliced wires and the light went off and no more 172. I was still getting a 33 but no CEL, then I shimmed the EVP and the 33 went away.
Total cost.................................50 cents for grommet used for shim.
All the repair shops wanted to change O2, EGR, EVP, and EVR. Hundreds of dollars.
Lead Driver
Joined: Nov 2002
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From: Concord, NC
I would re-check those codes because you will not get mixed digit codes--they will either all be 2 digit, or they will all be 3 digit codes. I suspect your 33 is two 111s or all clear codes.
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From: Montreal, Canada
Originally Posted by EPNCSU2006
I would re-check those codes because you will not get mixed digit codes--they will either all be 2 digit, or they will all be 3 digit codes. I suspect your 33 is two 111s or all clear codes.
Thanks again
Itch
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From: Solon, Ohio
Originally Posted by EPNCSU2006
I would re-check those codes because you will not get mixed digit codes--they will either all be 2 digit, or they will all be 3 digit codes. I suspect your 33 is two 111s or all clear codes.
I just remembered my codes were 172 and 334