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2001 Pontiac Bonneville Question: REPLACED MAF SENSOR NOW SERVICE ENGINE SOON LIGHT COMES ON AGAIN ?

 

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TigerPaw, Chicago, IL, October 12, 2013, 13:35
 Rookie

replaced maf sensor when car started too stumble on running rpm gauge going up and down then car too off fast and smoothed out, now service engine soon light comes on again and obd 2 code says po171

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  • Answer #1

    pushrod October 12, 2013, 14:03
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     Master

    Seek a mechanic to check your car out, many more possibilities besides the MAF sensor! Vacuum leak, low fuel pressure, 02 sensor or it's circuit, injector problem etc...

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