P2196/P2198 Code Fix

[gtorpedo]

Recently my car started running a bit unstable at cold start-up with RPM fluctuating between 600-1050 and AFRs between 10-13:1, and threw the P2196 and P2198 codes (O2 Sensor Signal Stuck Rich). Car ran fine once warmed up for a minute or two and returned to ~750 RPM idle and 14:1 AFR.

I replaced both upstream O2 sensors and this seems to have fixed the issue and is no longer throwing the code. Curious how many of you that are running long tube headers have had this issue and what your service life has been on the sensors? My car has just over 20k miles, with ~2k of them on the new motor with LTH.

 

[Mad Hatter]

If you track the car, the O2 sensores are something you usually have in your parts box. They are basically a wear item!!

When you put the LTHs in, did you get a tune?? Would strongly recommend you do!

 

[suprmn]

I just recently (last week) had an O2 Sensor go bad on me (Upstream) while running long tube headers.

I do track the car and have a custom tune through AED. I have roughly 52,000 miles on the car and this is the first time this has happened.

I searched for a decent set of Sensors that would work well and not break the bank.....settled for a NTK (#24348/Upstream) which ran around $106 each.

Awaiting for them to arrive next week to see if they too will fix my codes being thrown!

 

[gtorpedo]

On a related note, anyone with ARH headers relocate the upstream o2 bung so the sensor is tip down and back vs the horizontal orientation they come with? Shaun @ AED said this is a key reason why the o2 sensors fail due to the placement of the sensors (p*ss poor in his words). If so would really like to see some pictures of the work and hear your input.