Help! Code 91 on KOER Test
07-11-2008, 09:33 AM
#11
1st Gear Member
Join Date: Mar 2007
Location:
Posts: 60
RE: Help! Code 91 on KOER Test
My car is having almost the same issue, I have been thinking it was to do with my E303 Cam and not enough vacuum? I will have to check and see if I have a 160 degree in mine, I noticed my car seems to run cool. I also need to do a KOER check, can I take that somewere tio get it done cheap?
07-11-2008, 04:42 PM
#12
1st Gear Member
Thread Starter
Join Date: May 2008
Location: Maryland
Posts: 73
RE: Help! Code 91 on KOER Test
Don't take it anywhere just follow these instructions, do it yourself. Run a jumper wire or paper clip and count the blinks form the check engine light.
http://therangerstation.com/tech_library/OBD_I.html
http://therangerstation.com/tech_library/OBD_I.html
07-11-2008, 05:24 PM
#13
5th Gear Member
Join Date: Jan 2006
Location: Puerto Rico
Posts: 3,926
RE: Help! Code 91 on KOER Test
Switch O2 sensors from sides....... if code 41 shows up in a DIY KOEO/KOER/Cylinder Balance Self-Test instead of a 91, that O2 sensor is defective.
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