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Hey there Fit owners, quick question for ya. This is my first post on the forums, but the stuff I’ve read on here has been very helpful and great. Anyways, I’m thinking of installing a Yonaka Cat-Back exhaust On my 2013 fit sport. It occurred to me that I would have to make sure that the new exhaust has a threaded hole for the downstream oxygen sensor after the catalytic converter. I went under my car, and I could only find one oxygen sensor, upstream of the catalytic converter. Am I completely blind or is there really only one oxygen sensor in the second generation fit?
The air/fuel ratio sensor or primary oxygen sensor as it's commonly referred to, is threaded into the exhaust manifold bolted to the head on the backside of the engine. It is mounted high up on the exhaust manifold near the spark plugs/coils location and next to the firewall. It can be accessed by removing shielding around the valve cover to access the spark plugs and coils. A pic of the primary oxygen sensor can be found on this forum by doing a search for members that have reported finding loose spark plugs in their engines. One of these posts shows the procedure for accessing the plugs/coils. You can also find a diagram of the two oxygen sensors in the factory repair manual in section 11-67.
The secondary oxygen sensor is probably the one you found threaded into the catalytic converter. I hope this helps.
The air/fuel ratio sensor or primary oxygen sensor as it's commonly referred to, is threaded into the exhaust manifold bolted to the head on the backside of the engine. It is mounted high up on the exhaust manifold near the spark plugs/coils location and next to the firewall. It can be accessed by removing shielding around the valve cover to access the spark plugs and coils. A pic of the primary oxygen sensor can be found on this forum by doing a search for members that have reported finding loose spark plugs in their engines. One of these posts shows the procedure for accessing the plugs/coils. You can also find a diagram of the two oxygen sensors in the factory repair manual in section 11-67.
The secondary oxygen sensor is probably the one you found threaded into the catalytic converter. I hope this helps.
Thank you! That helps a lot, and that's a good bit of information to know about the 2nd gen Fit!
