Codes or Mazda Protege

MDLockard

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#1
The check engine light came on my Mazda. Codes were P0102 and P0031. What are those codes? Mechanic replaced 02 sensor (believe it was the front 02 sensor). Does my car have more than one 02 sensor? Mechanic said Mass Airflow Sensor (MAF) is next if check engine light comes on again. Car is a Mazda Protege ES 5spd with 105k.
Thanks!
 

2POINTautO

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#2
I have only seen a P1131 Lean, be cured by cleaning the MAF. I have no records of your codes. Can you tell us the year of your car just in case there may be a difference in Mazda codes through the years.
 
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#4
There are 2 O2 sensors on your car...The PO1O2 is MAF circuit low input...and the POO31 is front O2 sensor circuit low....you might want to check the connections on the MAF...Jim
 

MDLockard

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#5
Thanks for the help. After replacing the front 02 sensor and resetting the check engine light the check engine light has stayed off. Mechanic says if it comes on the next step is a rebuilt mass air flow sensor. Sounds like Mazda no longer makes a Mass Airflow Sensor (MAF) for my 2002 vehicle. Quote was around $300 for the MAF.
 
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#6
The dealer shows one for about $220.00..and NAPA shows one for $204.00..If you need one I would call around...Jim........dealer part# FS1E13215R00

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MDLockard

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#7
Thanks for the help! Check engine light is still off. Hoping the MAF will last a bit longer. However with over 100k I may need one soon.