P0731Gear 1 Incorrect Ratio

The transmission computer compares engine speed (RPM) to output/vehicle speed in first gear. P0731 means the ratio it measured does not match what first gear should be. In plain terms, the transmission is not delivering the correct first-gear ratio, often because of slipping or a hydraulic/solenoid fault.

Ամենատարածված պատճառներն են՝ Low or degraded/burnt transmission fluid, Worn clutches or bands inside the transmission, Faulty or stuck shift solenoid, Dirty or stuck valve in the valve body, Internal hydraulic leak or low line pressure, Failing input/output speed sensor giving wrong readings։

Սովորաբար անվտանգ է կարճ տարածությունների վրա վարել, սակայն շուտով ստուգել տվեք։

Check the transmission fluid level and condition first; low or burnt fluid is a common trigger. Because this code can indicate internal transmission slipping that gets worse with driving, have it diagnosed promptly by a transmission shop. Avoid hard acceleration until it is checked.