Re: Repeated sensor failure

 > KenK wrote:
 > In an attempt to extinguish a "Service Engine Soon"
dashboard warning light 
 > in my 2012 Nissan Versa Hatchback, I had the Mass Airflow Sensor at
first 
 > cleaned, then twice replaced, as indicated by the diagnosis.
Diagnostics, 
 > cleaning and replacements have cost ~$500. Light went back on this
morning. 
 > I'm tempted to just ignore it. Usually there is a week or so delay
between 
 > sensor cleaning or replacement and the light reappearing.
 > 
 > Anyone else? Suggestions?
 > 
 > TIA
 > 
 > 
 > -- 
 > I love a good meal! That's why I don't cook.

Dealing with a
persistent "Service Engine Soon" light can be really
frustrating, especially after spending so much on diagnostics and
replacements. Ignoring it might be tempting, but it could lead to more
significant issues down the line. 

After replacing the Mass Airflow Sensor, it's essential to reset the
trouble codes using an OBD2 scanner. This can clear any stored codes
in the ECU and might prevent the light from coming back on unless
there's another underlying issue. Sometimes, the "Service Engine
Soon" light can be triggered by other problems, such as a loose
gas cap, faulty oxygen sensor, or issues with the throttle body. It
might be worth having a comprehensive diagnostic check to rule out
other potential causes.

For the 2012 Nissan Versa Hatchback, cleaning the throttle body and
resetting it is recommended after replacing the MAF sensor. This can
sometimes resolve issues that cause the light to come back on. There's
also a manual method to reset the light that involves turning on the
car without starting the engine, pressing the accelerator pedal
multiple times, and then holding it down for a specific period. This
might help reset the light without needing a scanner.

Additionally, it's worth noting that the gas cap can sometimes be the
culprit. If it's not tightened properly, it can trigger the
"Service Engine Soon" light. Make sure the gas cap is secure
and see if that helps. If the light continues to reappear, it might be
worth consulting with a trusted mechanic to explore other potential
causes. Ignoring the light could lead to more severe problems, so it's
best to address it sooner rather than later. Good luck!
 

This is a response to the post seen at:
http://www.jlaforums.com/viewtopic.php?p=468716535#468716535