Checking for KOEO codes
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Fleet Mechanic
Joined: Jul 2004
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From: va
Checking for KOEO codes
To do a KOEO test first warm up the engine. Then turn off the engine and attach a jumper wire. Restart engine and the light will flash 4 for an 8 cyl. Right after this, depress the brake and release, if you have the 5.0L with P/S switch, move the steering wheel about 1/4 turn in either direction then back to where you started. Then momentarily go to wide open throttle and back to idle. Then get ready to read the codes."
I did this test and only got 4 flashes for my 8 cyl. Is it a must to do the brake, steer and throttle procedures, could I have trouble codes I don't know about?
1993 F-150 5.0.
I did this test and only got 4 flashes for my 8 cyl. Is it a must to do the brake, steer and throttle procedures, could I have trouble codes I don't know about?
1993 F-150 5.0.
Lead Driver
Joined: Nov 2002
Posts: 9,557
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From: Concord, NC
There should be four flashes for the engine code, then a single code telling you to goose the throttle and turn the steering wheel and push the brake pedal. Then it should begin blinking codes soon after that.
Elder User
Joined: Sep 2003
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From: Louisiana
My book says to do the Brake and P/S right after the engine ID, then wait for the single flash. Also, if you have a AEOD, you need to cycle the cancel switch during the brake and P/S or you'll get a 632.
Elder User
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From: Louisiana
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Lead Driver
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Fleet Mechanic
Joined: Jul 2004
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From: va
Just got run for 5 minutes then checked codes, turned wheel, brake and throttle, it took about a minute before the lite started flashing.
KOEO
636 TOT sensor voltage out of self test range
KOER
116 ECT out of self test range 0.3 to 3.7 volts
311 Thermactor air system inoperative (right side)
538 Insufficient RPM change during KOER dynamic response test/ Operator error
632 Overdrive cancel switch not changing state (E4OD)
Don't think i need to worry about codes 538, 632. Can i get the other codes with only a fuel problem? Idles fine after it warms up, runs rich and has sooty plugs. Whats a tot?
KOEO
636 TOT sensor voltage out of self test range
KOER
116 ECT out of self test range 0.3 to 3.7 volts
311 Thermactor air system inoperative (right side)
538 Insufficient RPM change during KOER dynamic response test/ Operator error
632 Overdrive cancel switch not changing state (E4OD)
Don't think i need to worry about codes 538, 632. Can i get the other codes with only a fuel problem? Idles fine after it warms up, runs rich and has sooty plugs. Whats a tot?
