Howell TBI O2 Sensor -
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Unread 06-02-2013, 06:28 PM   #1
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1978 CJ5 
Join Date: Aug 2012
Location: Greenville, NC
Posts: 173
Howell TBI O2 Sensor

The O2 sensor went out already went out on my 1 yr old Howell TBI system and the ECU is shooting code "13". I have the heated version and it it located in the header collector just before the muffler and run a 304. Is this normal? I thought those last many years. Is it possible to fool the ECU into thinking it is working? I am under no emissions testing and do not have to get the Jeep inspected ever again.



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Unread 06-02-2013, 09:07 PM   #2
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Join Date: Aug 2002
Location: Colorado
Posts: 14,434
The oxygen sensor is the main sensor in getting the air/fuel mixture right. It's not just there for emissions purposes.

Typically they do last for years. You may have ended up with a bad one, which happens every once in a while with any part.
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