P0731 OBD-II Trouble Code: Gear 1 Incorrect Ratio
P0731 P0731 code definition When the automatic transmission in a vehicle cannot shift into first gear, the PCM (powertrain control module) will detect and store a P0731 code (http://www.autocodes.com/p0731.html) (http://www.autocodes.com/p0731.html), and the Check Engine light will illuminate. What the P0731...
