What is a CODE 91 and CODE 34 ?????

Nov 7, 2000 | 08:16 PM

NEWGUY

Guest

Posts: n/a

My check engine light came on and it said that I had a CODE 91 and CODE 34. Can someone tell me what it is and how hard it is to fix. TIA

Nov 7, 2000 | 08:59 PM

Victim64

Senior Member

Joined: Oct 2000

Posts: 2,032

0901 is front 02 sensor, and 0304 is a knock sensor. Reset the light and see if these codes come up again. Also what year is your car? On some models there is a recall on the 02 sensor.

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