41-lean
Cargo Master
Joined: Jun 2013
Posts: 3,182
Likes: 15
From: Somewhere n North America
So, if you disconnect one side, check codes. Then disconnect the other side and check codes. You should get a Code # 42 for the one that is working.
Then plug them back in one at a time to verify.
Then plug them back in one at a time to verify.
Last edited by vjsimone; Aug 5, 2017 at 07:36 PM. Reason: Adding Text
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Mountain Pass
Joined: Oct 2016
Posts: 172
Likes: 1
From: georgia
SO I warmed the truck up today and then ran two separate tests one with the passenger side o2 unplugged no code change and one time with the driver side o2 unplugged and the passenger plugged in and still no change in code
Cargo Master
Joined: Jun 2013
Posts: 3,182
Likes: 15
From: Somewhere n North America
Disconnect both again, take it for a 5-10 mile drive.
Perform both KOEO & KOER test, and display ALL codes in accordance with Post #7.
Just want to be sure the EECM strategy is not ignoring the O2 sensors @ idle.
thanks.
Perform both KOEO & KOER test, and display ALL codes in accordance with Post #7.
Just want to be sure the EECM strategy is not ignoring the O2 sensors @ idle.
thanks.
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Mountain Pass
Joined: Oct 2016
Posts: 172
Likes: 1
From: georgia
I'm waiting to pull the o2 sensors for another test drive cause I've been drinking. But I've already pulled the eec and checked the capacitors nothing is leaking and everything looks extremely clean.
Lead Driver
Joined: May 2011
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Yeaaaaaaaaaaaah
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Cargo Master
Joined: Jun 2013
Posts: 3,182
Likes: 15
From: Somewhere n North America
When I replaced my 16 spark plugs & 8 coils yesterday, I was on my 3rd beer......
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Mountain Pass
Joined: Oct 2016
Posts: 172
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From: georgia
Haha my dd was Uber. I was at a brewery for a friends birthday. I just had my lunch break and disconnected both o2 sensors drove about 7 miles pulled back into he parking lot and ran the koer test again. Codes 41,31,75, and 91 were present.
Cargo Master
Joined: Jun 2013
Posts: 3,182
Likes: 15
From: Somewhere n North America
I need you to run the KOEO first, then the KOER.
We like to see codes in order of test. Thanks.
KOEO - (O) Self-Test Codes
KOEO - (C) Continuous Codes
KOER - (R) Self-Test Codes
We like to see codes in order of test. Thanks.
KOEO - (O) Self-Test Codes
KOEO - (C) Continuous Codes
KOER - (R) Self-Test Codes
Cargo Master
Joined: Jun 2013
Posts: 3,182
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From: Somewhere n North America
91 is a new code related to the O2 sensors. But which one?
After you re-run the two test, you will have to hook them back up one at a time, run test, to see which one caused the 91 Code.
Identify by color code;
Color Code;
left; DG/Y-O/Y-BK/LG
right; DG/P-O/Y-BK/LG
After you re-run the two test, you will have to hook them back up one at a time, run test, to see which one caused the 91 Code.
Identify by color code;
Color Code;
left; DG/Y-O/Y-BK/LG
right; DG/P-O/Y-BK/LG
Cargo Master
Joined: Jun 2013
Posts: 3,182
Likes: 15
From: Somewhere n North America
He got a 91, which I have never seen pop up before, but I'm sure it is related to this last test he did disconnecting the connectors. I think as he reconnects one at a time, and the code goes away, we might be able to narrow the O2 issue to one or the other. If the 91 Code does not go away, see next line;
The other twist is this code is listed for 84'-86' engines (O2 issue)(in Cars, not Trucks)....... Also can be a "Transaxle problem - Shift Solenoid 1 (SS1) Circuit Failure".
I would think his left & right are the same due to the lengths on the 90' harness.
He will eventually need to measure the Heater Circuit, and may need to ring out the O2 signal paths.
The other thing is some of these codes will show up in both KOEO & KOER test, so I would like him to post both. Also sometimes a different KOEO & KOER code are related.
If this were a 90' F-series, he would have a 4 wire O2, another time the F-series was ahead of the curve over a car.......
(Assuming all this is not actual Lean condition)
Last edited by vjsimone; Aug 8, 2017 at 10:47 AM. Reason: Adding Text
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