All posts tagged emissions

Replacing PCV and Purge Valves

I described the Miata’s valve cover gasket replacement earlier. At the time I had not replaced the PCV valve, however, now that the car has aged further and received a code P0106, I chose to change both the PCV valve and the purge valve. This post describes the changes. I chose not to change the boost solenoid, which is also recommended for fixing the P0106 code.

Posted on Mar 22, 2025 by Vikas N Kumar

Car passed inspection!

The Miata successfully passed inspection today. It took me nearly a year (364 days) since the purchase date to get the inspection done. Changing the O2 sensors was technically easy but I did not have the confidence to do it a year ago. Now I do ! Cannot explain how happy I am today that whatever hard work I have put in to make the car inspection-worthy has worked out well without any serious hiccups.

Posted on Jul 16, 2019 by Vikas N Kumar

Replacing Oxygen Sensors

Since I purchased the Miata it has had a check engine light (CEL) code P0140. One of the solutions among many is to replace the rear Oxygen (O2) sensor in this case. Having experienced bad O2 sensors in my truck in the past and looking at opinions on the web, I decided to replace both the sensors to be safe. My car is a California emissions car and the location of the O2 sensors are different from the rest of the USA (Federal) emissions versions of the same car.

Posted on Jul 11, 2019 by Vikas N Kumar