P102 Maf low input

meanstreak007 · Post by **meanstreak007** » 12 Mar 2012, 14:35

Hello, I have a 1998 Volvo S70 non-turbo pulling OBD code P102 (MAF low input). I changed the MAF about 6 months ago so I took it back to Autozone and got another remanufactured MAF. 30 minutes later same engine code,changed air filter(paper), cleaned throttle body, looked for any air leaks couldn't find any. Then I took ground wire off and ground paint off of metal and reconnected. Cleaned new MAF again, no luck.The engine is surging at idle but over 2000 rpm is fine. Engine code comes on 5 seconds after clearing. was thinking about changing ecm, not sure if it is OK on this model. Do I just disconnect battery and replace? Thanks in advance for your help.

Post by **regent** » 12 Mar 2012, 15:00

Did you check the line to the brake booster and the check valve?

meanstreak007 · Post by **meanstreak007** » 12 Mar 2012, 15:32

No not yet. Thanks, I will check that when my daughter gets home from work tonight.

Post by **erikv11** » 12 Mar 2012, 21:31

You can't put in aftermarket MAF sensors, they almost always throw a p0102. The car will only be happy with a blue-box Volvo or Bosch (which is the same) unit.

Post by **pkc303** » 12 Mar 2012, 22:18

Wow. I have the same code on my wife's V70. My fan stays on a few min. After shutdown too, even if the engine is cold.

Post by **erikv11** » 13 Mar 2012, 00:23

p0102 is usually a MAF problem, sometimes a vacuum leak. OP's does sound more like a vacuum problem, now that I re-read the post (stumbles at idle, but OK with high revs). But very difficult to know if there is an aftermarket MAF in there.

meanstreak007 · Post by **meanstreak007** » 13 Mar 2012, 08:40

the maf i used was a remanufactured Cordone brand from Autozone.

Post by **jblackburn** » 13 Mar 2012, 08:58

Well that's why. Volvos hate aftermarket sensors.

Either get a used Bosch from a junkyard, or you'll have to dish out the money for a genuine Bosch/Volvo replacement.

Post by **regent** » 13 Mar 2012, 15:43

That's right - you either love your Volvo or you love your money - you can't go both ways

meanstreak007 · Post by **meanstreak007** » 13 Mar 2012, 19:58

brake booster vaccuum line was connected and check valve seemed to work