So, think about your driving habits, and if you are driving in areas where you may need to accelerate or decelerate quickly, get this issue dealt with right away. On the Interstate, though, it can be a very different matter. If you are just driving around town, failing to get into proper gear is not likely to get you killed. How serious is the P0768 code?ĭifficulty shifting can be problematic, especially if you are driving at highway speeds. Sometimes, too, they may replace the PCM, assuming that it is not working properly, but the fact is that your vehicle’s PCM is hardly ever likely to fail. Mechanics sometimes assume that the shift solenoid is faulty and replace it when in fact, the problem is nothing more than contaminated transmission fluid. Repair or replace any connectors and circuits that have been identified as faulty following the voltage checkĬommon mistakes when diagnosing the P0768 code.Do a voltage check if the codes have re-appeared.Test drive the vehicle, and upon returning re-check to determine if the codes have cleared. Re-test the system to make sure that any repairs have been successful.Check the hydraulic pump, pressure regulator and solenoids and replace any defective parts.Examine wiring and connectors and replace any that are damaged.Flush out the transmission fluid if it is determined to be contaminated.Examine the transmission fluid to see if it is dirty or low, or if it has a burnt smell.The first step in diagnosing the P0768 code is for the mechanic to use a code reader and an ohmmeter to evaluate the computerized system in the vehicle that regulates speed inputs and transmission outputs. How does a mechanic diagnose the P0768 code? You might drive for a very long time without seeing any symptoms other than a glowing Check Engine Light, but it might be best not to count on that. * A bad TCM (transmission control module) What are the symptoms of the P0768 code? If the gear ratio recommended by your vehicle manufacturer is not compatible with the actual ratio that the PCM detects, then a P0768 code is stored, and your Check Engine Light may come on. You need varying gear ratios to accelerate and decelerate, and also to ensure that your engine is working properly and you are getting good fuel economy. Your vehicle’s automatic transmission makes use of shift solenoids to transfer fluid through the hydraulic circuits and change your gear ratios. When the PCM in your vehicle records trouble code P0768, it means that it has found a problem in shift solenoid D.
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