2002 toyota corolla
P0300 is a generic misfire code. P0301 is a misfire on cylinder #1 We're the spark plugs and wires ever replaced? P0171 means a lean condition is present. Change your air filter and clean the MAF with CRC MAF cleaner. You can find the procedure on youtube. If the code still comes up, after the cleaning, it might be the O2 sensor on Bank 1.
thanks will do this a.m.. then sell car. 2.000.00
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