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2013 highlander base 2.7 4 cylinder 

how can i fix code p0171  system too lean ( A/F lean, bank 1


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Posted by: @trompon-789

how can i fix code p0171  system too lean ( A/F lean, bank 1

first you need to find out the cause, and there are many. Follow the troubleshooting here:

 

https://www.obd-codes.com/p0171


1

https://www.autocodes.com/p0171_toyota.html


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