Insuffucient EGR flow
Senior User
Joined: Oct 2003
Posts: 118
Likes: 0
I got the solenoid yesterday and installed it. I disconnected the battery to clear all codes then went for a test drive. Retested the comp. with a code reader and all EGR system components are good. I'm no longer getting the insufficient flow code. My guess would be that the electronics of the solenoid were in working order and not throwing a code, but the internal valve of the solenoid was malfunctioning or clogged.
Thanks for all the help.
Now I have a another problem. The truck still wants to stall. When I re-read the codes, the EGR system was clear but it came back with the following 2 codes:
KOER 172 - HEGO sensor fault/lean
KOER 411 - Can not control RPM during KOER low RPM check.
Any ideas???
Thanks for all the help.
Now I have a another problem. The truck still wants to stall. When I re-read the codes, the EGR system was clear but it came back with the following 2 codes:
KOER 172 - HEGO sensor fault/lean
KOER 411 - Can not control RPM during KOER low RPM check.
Any ideas???
Post Fiend
Joined: Dec 2001
Posts: 10,562
Likes: 4
From: South Jersey
The stalling problem (code 411) is probably the IAC, I would run the pinpint tests.
The 172 could be due to a defective O2, vacuum leak, exhaust leak, low fuel pressure bad wiring, dirty MAF, EVAP problem. Again the pinpoint tests would help.
Drop me an email if you need a copy of the tests, please remind me about your truck & codes.
The 172 could be due to a defective O2, vacuum leak, exhaust leak, low fuel pressure bad wiring, dirty MAF, EVAP problem. Again the pinpoint tests would help.
Drop me an email if you need a copy of the tests, please remind me about your truck & codes.
Senior User
Joined: Oct 2003
Posts: 118
Likes: 0
It's all good
I went to the parts store after work with my codes and my problem. They sold me a TPS and an O2 sensor. I replaced the TPS first, reset the computer and drove it around to warm it up. I hooked up the code reader again, before I attempted to change the O2 sensor.
KOEO = 111
KOER = 111
So from what I can tell, my problems were:
Faulty EGR valve position sensor (clogged)
Faulty EGR valve solenoid (clogged/mechanical malfunction...it did not throw a code because the solenoid portion of it was still functioning properly.)
Faulty Throttle position sensor (150,000 mile wear-out)
It's running smooth now and the Idle positon screw is backed out almost all the way, where it should be.
Thanks for all the help guys and on a side note...
I finally located my PCV valve (it's in the weirdest place)
KOEO = 111
KOER = 111
So from what I can tell, my problems were:
Faulty EGR valve position sensor (clogged)
Faulty EGR valve solenoid (clogged/mechanical malfunction...it did not throw a code because the solenoid portion of it was still functioning properly.)
Faulty Throttle position sensor (150,000 mile wear-out)
It's running smooth now and the Idle positon screw is backed out almost all the way, where it should be.
Thanks for all the help guys and on a side note...
I finally located my PCV valve (it's in the weirdest place)
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Al_Cuevas
1997 - 2003 F150
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Aug 13, 2016 08:50 AM
