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Old 12-13-2005, 10:01 AM   #1
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Default code34 Maf sensor

Hi code 34 maf sensor,sayscheck for loose or damaged air duct,misadjusted minimum idle speedand vaccuum leaks , check maf sensor.Does this mean I need new maf sensor,can anyone elaborate what to check please Has anyone had this code.thankyou
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Old 12-13-2005, 10:07 AM   #2
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Forgot to mention it sometimes stalls at stoplight and once in a while hesitates.Service engine light only comes on sometimes not all the time,does seem electrical but connection to maf sensor seems ok.Thanks
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Old 12-13-2005, 10:10 AM   #3
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You could try pulling the MAF sensor and cleaning it with alcohol and a q tip very gently. The wires are the sensor and if either break, the sensor is bad.
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Old 12-13-2005, 10:44 AM   #4
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give the sensor a tap during idle. if this changes the idle or if the engine runs bad, then the sensor is bad.
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Old 12-13-2005, 10:59 AM   #5
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What part of sensor am I applying alcohol to ?Before I go out in that cold I just want to be sure ,I just see a black square thing.
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Old 12-13-2005, 11:04 AM   #6
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Quote:
Originally Posted by jdq
What part of sensor am I applying alcohol to ?Before I go out in that cold I just want to be sure ,I just see a black square thing.
You need to unscrew the sensor. You'll notice the part that plugs into the throttle body has the two tiny coils referred to above. Be SUPER gentle!
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Old 12-14-2005, 09:39 PM   #7
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well cleaned maf sensor and its in tact,hasnt stalled yet but wasnt always stalling ,also tried tapping it with screwdriver no change .Still idling a it funny kind of like a slight surge between 900 and 1300 rpms.What does misadjusted minimum idle speed mean and thankyou for replys.
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Old 12-16-2005, 03:01 PM   #8
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Is it possible it could be IAC or TPS oxygen sensor ,FPR even though I get code 34 for maf sensor just want to try evrything before spending on new maf.
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Old 12-17-2005, 06:54 PM   #9
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Default Vaccuum leak

Well , took off EGR and cleaned it up really good seemed like one pintle if thats what it was called was not moving well,really dirty,reset code so far so good drove around for a bit.
Another question ,been looking for vaccuum leaks and couldnt find any not just for idle problem but because of heater not working good,anyways I found a air hose disconnected which I think was for headlight washer behind left headlight, is this an air line as it is black hard pipe hose with rubber elbow like the other vaccuum hoses.Also will this be counted as a vaccuum leak.thankyou much.
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Old 12-17-2005, 07:36 PM   #10
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Sounds like a vacuum line that needs to be connected to your charcoal canister. Can you take a pic?

The idle and stalling will most likely be fixed by removing the TB and cleaning it and the IAC.
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