240DL 1986: High NO and Air Flow Sensor - Volvo Forums - Volvo Enthusiasts Forum

Go Back   Volvo Forums - Volvo Enthusiasts Forum > Volvo Vehicles > Volvo 240, 740 & 940

LinkBack Thread Tools Search this Thread
Old 04-05-2006, 11:37 PM
Join Date: Apr 2006
Posts: 2
Default 240DL 1986: High NO and Air Flow Sensor

The problem that I am facing is with the very high NOx value and replacing the air flow sensor for my 1986 Volvo 240 DL.

Note: {}=15mph test, []=25mph test

About 2 years ago, I had the 02 sensor, tac door actuator, and cat converter replaced. The HC and CO readings decreased from {105ppm}, [100ppm] to {48ppm}, [33ppm] and {0.34%}, [0.33%] to {0.01%},[0.01%] respectively. However, NO values did not improve that much (before repairs {3288ppm}, [3116ppm]: after repairs {3209ppm}, [2928ppm]. I opted for the 2 year extention since that was my allowed budget at that time. The total cost for parts and labor were $993.47: I paid $493.47 and the CAP deducted $500. Until today, the car did not have any major problems. I now have to decide if I should replace the air flow sensor ($495) so that the car can operate or donate/recycle the car since even if I replace the air flow sensor, I still need to fix the NO problem by Aug 2006, which is when my 2 year extention ends. Any advice would be greatly appreciated. Please let me know if I should post more information about my car or smog test results. Thank you.
Reply With Quote
Old 04-05-2006, 11:42 PM
Senior Member
Join Date: Sep 2005
Posts: 393
Default RE: 240DL 1986: High NO and Air Flow Sensor

you can buy a used air flow sensor very resonably about $25. go to www.car-part.com search for your specific part then go to the page with an asterisk for the lowest price. I bought two good ones for $20 each! This is why I work on my own car.
Reply With Quote
Old 04-06-2006, 12:25 AM
Join Date: Apr 2006
Posts: 2
Default RE: 240DL 1986: High NO and Air Flow Sensor

Dear wojeepster,

Thank you for the quick reply. From the provided link, I selected 1986 and Volvo 240 but could not find air flow sensor or mass air flow sensor in the "Select parts" section. Is air flow meter the same term for air flow sensor? I'm sorry for asking all these questions.

Edit: Would replacing the bad air flow sensor improve my chances of passing the smog test? I should mention that I live in California, Foster City.
Reply With Quote
Old 04-10-2006, 11:55 PM
Senior Member
Join Date: Sep 2005
Posts: 393
Default RE: 240DL 1986: High NO and Air Flow Sensor

yes that is correct. Get the number off the side of your mass air flow 212 xxx xxx 007 from my distorted memory (look at yours don't go by my memory). Then when you call make sure you get the same number. Yes it will improve your chances as the car will run very poorly with a bad one. In the eary years of fuel injection cars had air flow meters so that is what it is call on that website. Good luck to you.

If I remember correctly high nox is from high combustion temperatures
Reply With Quote

Similar Threads
Thread Thread Starter Forum Replies Last Post
Cold Air intake or K&N/ High Flow filter? kelsodatrini Volvo 850 3 04-21-2009 07:23 AM
High Flow aftermarket air filter Saleen9090 Volvo 850 3 04-15-2009 08:50 PM
High flow air intake mod samadkins29 Volvo S70 2 05-04-2007 12:14 PM
Mass air flow sensor cleaner reg General Volvo Chat 3 01-02-2006 12:41 AM
Mass air flow sensor floryed Volvo 850 1 04-14-2005 11:51 AM

1986, 2006, 240, 240dl, air, car, check, dl, flow, high, location, mass, nox, price, sensor, volvo

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


All times are GMT -5. The time now is 08:44 AM.

This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company.