KOER Codes 090 & 157 | Ford Explorer - Ford Ranger Forums - Serious Explorations

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KOER Codes 090 & 157

DesertGeezer

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1993 Eddie Baurer
I have a '93 Explorer that was throwing MAF and EGR KOEO codes, I cleaned both and now have a good code 111, but now am throwing both a Code 090 and Code 157 on the KOER test. HELP!!

Thanks
 


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Sams01XplrSprt

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welcome
 




BrooklynBay

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DesertGeezer

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Yes, the codes showed up afterwards.

UPDATE: Replaced MAF, cured problem. Still don't know what a Code 090 is however. :D

I used an Innova 3120 reader and it worked great.

Thanks again.
 




BrooklynBay

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MrShorty

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The only 90 code I can think of (or series of pulses that could be interpreted as 9) is from the cylinder balance test. Some code readers interpret the 9 pulses that indicate a pass on the cylinder balance test as 90 (or 090 if the reader is going to insist on 3 digit codes). When you performed the KOER test, did you trigger the cylinder balance test at the end?
 




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