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1993 volvo 940 turbo. What are the signs of a bad mass airflow sensor

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  • Volvo Expert
  • 412 Answers

To read fault codes on that you need the Volvo VST scanner. Find a shop equipped with one. You can test the sensor. With the engine stone cold hook a digital multimeter up with the + side hooked to the #3 wire in the connector to the MAF sensor. - hooked to a good ground.Reading in the first 15 seconds should be 1.32 to 1.41 vdc. At operating temp reading should be 2.39-2.85 vdc.

Posted on Apr 09, 2015

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  • Volvo Master
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Have the fault codes read as the signs if a bad MAF will be the same as a variety of other sensor faults

Posted on Apr 08, 2015

6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

Benimur
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SOURCE: 02 sedona hard time starting and mass airflow sensor issues

Hi,

Appreciate the direct "Ask Me".

Hard starting could be caused by a number of faults such as weak battery corroded/loose battery terminals, fuel delivery issues and others which may include as you posted the MAF sensor. In my country however, most Kias have a peculiarity. They like to be well warmed up (even if it is hot here). Hard starting specially after short hops/trips is actually the ECU/ECM/Control Module or the car's computer getting mixed sensory inputs. The corrective action is to warm up the car fully before using. In some instances, it may also be required to reset the computer by removing the negative battery terminal for a few minutes. Pls bear in mind that some alarms are triggered this way and/or some car stereos would require a security code if the battery is removed.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards. Thank you for using FixYa.

Posted on Sep 04, 2008

emissionwiz
  • 74945 Answers

SOURCE: Mass Airflow Sensor 2005 Chevy Malibu. 2.2 ltr.4 cyl.

The MAF is in the flex hose that delivers air to the engine, it has a 5 or 6 wire connector going to it.

Posted on Nov 19, 2008

  • 2 Answers

SOURCE: 1993 Volvo 940 gle - speedometer not working

about 240.00 according to the volvo dr. ,fountain vally ,ca. An elect. part behind the speedo. is the problem . My 91 940 speedo stops working at 45 mph. thats what they told me. good luck,pete.

Posted on Jan 07, 2009

  • 1 Answer

SOURCE: Need radio code for a 1993 Volvo 940 GL

there are other forums type volvo radio unlock into the search engine. One way has to do with emergency 6666 code. You can get the radio to come on for 5 mins. At least you can then know that you have a working radio and not a dead one. Used car owners frequently think it is a dead radio and pay to get it replaced!! Yes, you must prove ownership at the volvo dealer, but you can get the info for free (if they are good guys).

Posted on Feb 20, 2009

  • 54 Answers

SOURCE: Pulled Codes Volvo 1995 850 Need Help

I would lean toward the MAF sensor they were known for going bad, which would cause all these codes. It wouldn't hurt to take the IAC off and spray it out with carb cleaner and some WD40, just to cover your bases. Both these units were made by Bosch and the MAF failed alot more often then the IAC.

Posted on May 23, 2009

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