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Kyle N.
Kyle N., Toyota Technician
Category: Toyota
Satisfied Customers: 5229
Experience:  ASE Master Auto Technician, L1 certified, CA. Smog Lic.
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I have PO171 trouble code on my 2002 Toyota Camry...

Customer Question

I have PO171 trouble code on my 2002 Toyota Camry... How do you trouble shoot that and can you test a MAF sensor
Submitted: 7 years ago.
Category: Toyota
Expert:  Kyle N. replied 7 years ago.


That code is a fuel system lean code. The first thing you want to do for that code is check the fuel pressure coming into the engine. You need a fuel pressure gauge for fuel injected engines. This will tell you if you have a problem with your fuel pump or a problem with a sensor like an O2 sensor or a MAF.