Mysterious error codes, which are displayed on the scanners' monitors, sometimes baffle drivers. In fact, all car electronics simply fixes malfunctions, and we are left to deal with them ourselves. Error code P0171, which is produced by engines of Nissan, Mazda, Opel or Toyota, means that the mixture in the combustion chamber is too lean. Let's figure out how to reset the error and fix the problem right now.
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