1993 Volvo 940 codes check engine light on

Tiny
JIM234
  • MEMBER
  • 1993 VOLVO 940
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 184 MILES
My check engine light came on yesterday. When I push the accelerator it chokes. I leave it off for a while and it runs and then happens again. Check engine light still on. I read the codes and get

1-2-1

which is

MAF sensor signal absent or faulty LH 2.4 or 3.1

what is this code?

Thank You

Jim
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Sunday, June 14th, 2009 AT 11:41 AM

1 Reply

Tiny
RACEFAN966
  • EXPERT
Ok here is the diagnostic procedures to test the mass air flow unit and wiring to determine if you should replace the sensor or not. You will need to save pic and then enlarge so you can read it and test it. Let me know how it goes.
Test 1


https://www.2carpros.com/forum/automotive_pictures/249564_Graphic_92.jpg


Test 2


https://www.2carpros.com/forum/automotive_pictures/249564_Graphic1_21.jpg


Test 3


https://www.2carpros.com/forum/automotive_pictures/249564_Graphic2_9.jpg

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Monday, June 15th, 2009 AT 1:43 PM

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