Unexpected Code Thrown
10-16-2013, 11:31 PM
#1
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Year: 2001
Model: Cherokee
Engine: 4.0 I6
Unexpected Code Thrown
CEL came on today, plugged in the scanner and got "P0101 - MAF or VAF A Circuit Range/Performance." This surprised me because I was pretty sure that the 4.0 doesn't use a MAF or VAF sensor. Is there one and I've just never noticed it or am I right in thinking this code should never be thrown?
10-17-2013, 08:09 AM
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Year: 1999
Model: Cherokee
Engine: 4.0
P0101 doesn't exist for a OBD II XJ. Some scanners/code readers must be programed to the vehicle they will be used on, i.e., the 2001 Jeep, and it sounds like that scanner/code reader wasn't.
Try a different scanner/code reader.
Try a different scanner/code reader.
10-17-2013, 10:42 AM
#4
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Year: 1996
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Or do the KOEO cycle to get the code on the dash. That is usually a lot more precise than a generic scanner.
I think a few '97s could
10-17-2013, 10:49 AM
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Really? I thought it worked on all of them. At least for me it has worked on all the OBD-II and OBD-I Jeeps I have looked at. Learned something new today.
10-17-2013, 12:00 PM
#7
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Year: 1999
Model: Cherokee
Engine: 4.0
Salad is correct. The ability to pull codes with the "key-on, key-off" technique went away sometime mid-1997 for the XJ.
If you do the key-on, key-off technique on post 97 models, all you get is a cluster self-test, but you won't get any codes.
If you do the key-on, key-off technique on post 97 models, all you get is a cluster self-test, but you won't get any codes.
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10-17-2013, 12:12 PM
#8
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Year: 1999
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Engine: 4.0
CEL came on today, plugged in the scanner and got "P0101 - MAF or VAF A Circuit Range/Performance." This surprised me because I was pretty sure that the 4.0 doesn't use a MAF or VAF sensor. Is there one and I've just never noticed it or am I right in thinking this code should never be thrown?
10-17-2013, 12:16 PM
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Year: 2001
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Ill try a different scanner, I've just got a really cheap $15 one from amazon so I'm not surprised haha. Thanks everyone
10-17-2013, 12:18 PM
#10
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Year: 2001
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Well I had a p0301 so I replaced the plugs with NTK and all is well now, I went in to clear the code for that and it gave me the P0101 also so I was just wondering if my scanner sucks or I am an idiot. haha
10-17-2013, 12:50 PM
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Year: 1999
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Clear all codes and drive it. If P0101 reappears, think P0201.
Get a new scanner if you have the bux, otherwise get a new code reader (OBD II is all you need, not OBD I and II, or CAN).
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