5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

koeo codes

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Old Mar 16, 2009 | 11:21 PM
  #1  
lx5.0's Avatar
lx5.0
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Joined: Apr 2008
Posts: 457
From: el paso tx
Default koeo codes

i ran a test to see what codes i would get and this is what i got
31 - EGR Valve Position/Pressure Feedback EGR Circuit Below Minimum Voltage. 0.24 volts (O,CM,R)
81 - Secondary Air Diverter Circuit Failure (O)
82 - Secondary Air Bypass Circuit Failure (O)
84 - EGR Vacuum Regulator (EVR) Control Circuit Failure (O)
85 - CANP Circuit Failure (O
are these codes my emissions stuff cause ive deleted them i dont know about code 81 and 82 is that emissions also
Old Mar 17, 2009 | 01:55 AM
  #2  
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94ford5liter
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From: California
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Pretty sure those are all smog related, dealing with what you removed. Did you remove the egr as well? Cause I think that first code is a bad a egr sensor otherwise.
Old Mar 17, 2009 | 06:39 AM
  #3  
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Joel5.0
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From: Puerto Rico
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81, 82 and 84 are for the three solenoids behind the RH side strut tower being disconnected/missing.

85 is for the CANister Purge solenoid being disconnected/removed.

31 is for the EGR sensor being disconnected/removed.

In your setup, it's the equivalent of a "system pass".
Old Mar 17, 2009 | 12:44 PM
  #4  
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From: OR
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Could you give me a little help with my codes?
111-pass code? what is a pass code?

165?

536-Brake on/off....replaced it

Thank You
KJ
Old Mar 17, 2009 | 01:22 PM
  #5  
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Joel5.0
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111 - no fault codes registered for that self test routine.

165 - no clue, it doesn't show as a valid KOEO or KOER self test code

536 - Brake On/Off circuit failure / switch not actuated during KOER test

If the fault code was logged during a KOER, it means you forgot to press the brake pedal after the engine ID code was displayed (4 = 8 cylinders engine), not that the switch was at fault...... LUK.
Old Mar 17, 2009 | 08:15 PM
  #6  
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KJMac
 
Joined: Mar 2009
Posts: 31
From: OR
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Thank you for the help! Should I reset the computer ? I'm going out now to clean the MAF and change plugs. and test drive....I hope it isn't the fuel pump!
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