Toyota P0171 Code Reasons
4runner o2 P0171 sensor p0174 p0170 oxygen bank lean system too fuel code trim dtc ecu constantly P0420 fixed with replacing o2 and a/f sensors
P0170 - Fuel Trim - My Pro Street
4runner o2 P0171 sensor p0174 p0170 oxygen bank lean system too fuel code trim dtc ecu constantly P0420 fixed with replacing o2 and a/f sensors
