Mitsubishi Montero & Montero Sport This sport utility vehicle offers more size than the other Mitsubishi SUVs, but manages to keep a sporty look and comfortable feel, unlike many larger SUVs.

Error Code P0173-Fuel Trim Bank?

  #1  
Old 12-19-2010, 08:44 AM
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Default Error Code P0173-Fuel Trim Bank?

I got two error codes, P0173 and P0125. I thought the cause of the P0173 was the P0125. However the ECT is fine, and I just replaced the thermostats, coolent is full.

So now I'm guessing its the P0173 causing the P0125. Autozone can't tell me what a P0173 is for a mitsubishi is. However, for a Kia its a problem with Fuel Trim Bank 2. Whats a Fuel Trim Bank?
 
  #2  
Old 12-20-2010, 03:48 AM
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The following should help explain:

http://www.obd-codes.com/p0173
 
  #3  
Old 12-20-2010, 09:55 AM
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Yeh, it sounds pretty innocuous and can be a lot of things. It definitely is "heat" sensitive. I thought it was fixed as the light went out. However, after a long hard drive yesterday with the car heating up a bunch, the light came back on.
 
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Old 12-20-2010, 10:16 AM
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Wow the Mass Air Flow sensor is $300. Thats a lot to spend on a "maybe".... It doesn't make sense that the mass air flow sensor would work some of the time and not some of the time. I would think this particular part would be an all or nothing.
 
  #5  
Old 12-21-2010, 10:24 AM
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I guess I'll start by cleaning the MAF sensor. If that doesn't work, then I replace the O2 sensor.
 
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