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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?

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?