Code 91

Joe50 · 10-15-2002, 04:16 PM

What can cause this code if you have already changed both oxygen sensors and you know the car is not running lean? Has anyone ever had this code before and what did you do to fix it?

Thanks

Superpromustang · 10-15-2002, 05:20 PM

If you're getting a code 91 and you've replaced both oxygen sensors, then there's something else wrong, is this a mass air car or a speed density car?

Joe50 · 10-15-2002, 08:21 PM

Mass Air Car...and ive checked and checked again and I cant find any vacuum leaks either...

10-15-2002, 04:16 PM	#1
Joe50 Registered Member Join Date: Jan 2000 Location: Newport News, VA Posts: 78	Code 91 What can cause this code if you have already changed both oxygen sensors and you know the car is not running lean? Has anyone ever had this code before and what did you do to fix it? Thanks __________________ "Drive it like you stole it!" '94 Vibrant Red GT

10-15-2002, 08:21 PM	#3
Joe50 Registered Member Join Date: Jan 2000 Location: Newport News, VA Posts: 78	Mass Air Car...and ive checked and checked again and I cant find any vacuum leaks either... __________________ "Drive it like you stole it!" '94 Vibrant Red GT

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10-15-2002, 05:20 PM	#2
Superpromustang Registered Member Join Date: Oct 2002 Location: Carthage, MO Posts: 59	If you're getting a code 91 and you've replaced both oxygen sensors, then there's something else wrong, is this a mass air car or a speed density car?