# MAF sensor, throttle, catalytic converters **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** volvo\ **Created:** [January 27, 2021, 2:01pm UTC](https://community.cartalk.com/t/maf-sensor-throttle-catalytic-converters/174535 "2021-01-27T14:01:08Z")\ **Posts on this page:** 2\ **Page:** 2
**Author:** ![BikeGuy88](https://avatars.discourse-cdn.com/v4/letter/b/c37758/32.png) [@BikeGuy88](https://community.cartalk.com/u/BikeGuy88)\ **Post date:** [February 1, 2021, 9:22pm UTC](https://community.cartalk.com/t/maf-sensor-throttle-catalytic-converters/174535/31 "2021-02-01T21:22:25Z")
Some people _believe_ that it worked for them. Without a carefully controlled testing environment, and repeated observations, it’s impossible to know if this or some other confounding factor played a role. I think the old “if it sounds too good to be true” adage is still intact here… ---
**Author:** ![NYBo](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nybo/32/17281_2.png) [@NYBo](https://community.cartalk.com/u/NYBo)\ **Post date:** [February 1, 2021, 9:54pm UTC](https://community.cartalk.com/t/maf-sensor-throttle-catalytic-converters/174535/32 "2021-02-01T21:54:34Z")
> [@BikeGuy88](#): > > Some people _believe_ that it worked for them. Without a carefully controlled testing environment, and repeated observations, it’s impossible to know if this or some other confounding factor played a role. > > I think the old “if it sounds too good to be true” adage is still intact here… As per what I have been told, the vehicles in question had catalyst efficiency error codes, which went away with use of the product. I suppose it’s possible the codes went away spontaneously, but I think that’s highly unlikely. Again, how bad the cats were is unknown but I’ll bet they were right at the edge of working properly. YMMV [Previous page](https://community.cartalk.com/t/maf-sensor-throttle-catalytic-converters/174535.md?page=1)