240 General: MAF sensor

[aidanmac]

I have the following error codes on my 1993 2.0 245 SE; 1-2-1 and 3-2-2 and 1-1-3 which all seems to suggest that my MAF sensor is faulty. The car is running fine but is running way to rich and using a lot of petrol. Should i replace the MAF sensor and will an aftermarket part be ok or will i need the genuine BOSCH 0280212016 part?
I have tried cleaning the connector and resetting the system by disconnecting the battery but no change.
Could the O2 sensor (lambda probe ??) be the cause.

Are the genuine parts still available. if so how much and where???

[radiomark]

You should be able to get original parts but they cost a lot.
Try ebay or braydon motors.
I replaced the o2 and the maf on mine.
Www.lambdapower.co.uk

[bob12]

You will find that the Bosch air mass meter pt no 0 280 212 016 is common over a vast majority of the 200/700/900 range, plus others. You should be able to pick up a good secondhand one in the 'Sales' sections. Put up a wanted ad in both sections and I am sure that you will get a reply.

In fact, I think that if you go look at the 700/900 Sales that a guy called 'Another Volvonut' who is clearing his garage at the moment and who I went and saw has one unless it's gone already. Bob.

[tannachyallen]

There is this one on Ebay at present: http://www.ebay.co.uk/itm/1996-Volvo...item257341f39d

from a 900 series but same part no.

The other trick is cleaning the actual sensor wire inside the unit with contact cleaner spray.......somtimes works

Dave A.

[meltedcheese]

I have one for sale over in the 900 sales section here -

http://www.volvoforums.org.uk/showthread.php?t=160739

http://www.ebay.co.uk/itm/ws/eBayISA...#ht_500wt_1414

Just notice you can't read the p/n on the pic if you need it let me know

[Clan]

Originally Posted by tannachyallen

There is this one on Ebay at present: http://www.ebay.co.uk/itm/1996-Volvo...item257341f39d

from a 900 series but same part no.

The other trick is cleaning the actual sensor wire inside the unit with contact cleaner spray.......somtimes works

Dave A.

often fails and ruins the sensor ! They do not need cleaning , they self clean by heating the hot wire up to red hot to burn and deposits off . How can they get dirty anyway being fed with clean filtered air ...

[Stephen Edwin]

Originally Posted by Clan

often fails and ruins the sensor ! They do not need cleaning , they self clean by heating the hot wire up to red hot to burn and deposits off . How can they get dirty anyway being fed with clean filtered air ...

Pedant in operation. They get deposits, which is surely dirt, which should be burned off in response to a signal from the ecu....? If the burn off has not occurred or not been sufficient a cleaner may help remove that dirt?

Thanks Clan. I am so not surprised that the cleaner often fails and ruins the sensor. So those cleaners are NOT a good maintence idea. Possibly useful as a desperate get home measure, if there is nothing left to lose?

[arluk3]

I had always assumed that a bad MAF sensor would make the engine run poorly, just as disconnecting the MAF does (the "limp home mode" in which you can drive home). But this is not true. Apparently a bad MAF can result in any number of issues which mimic every conceivable problem in either the fuel injection or electronic ignition systems! My friend had a MAF failure which acted like something else because he couldn't even get his car to move and had to have it towed. Later he disconnected the MAF and the car ran well enough to drive. So I would suggest that any catastrophic driving issue should first be addressed by disconnecting the MAF to see if things improve. The MAF has some very complex circuitry on its inside and probably cannot be fixed by the layman, but it is easy to replace and easy to disconnect.

[Angie]

This thread http://www.volvoforums.org.uk/showth...=255281&page=6 is lengthy but lots of helpful replies so maybe you'll find something useful there.

[DW42]

If the MAF needs replacing, when you put a new one in also check the air box thermostat. On cold days this directs warm air to the intake from near the exhaust manifold via the big silver accordion hose. If the thermostat fails in this position, the MAF receives very hot air when the engine is warm which kills the MAF off before its time.

You can remove the accordion hose and wire the flap if you're not holidaying in Sweden in winter.