What does P0957 Mean? OBD-II Code Powertrain Control Module (PCM) failure is defined as a Auto Shift Manual Mode Circuit Low Some vehicles equipped with automatic transmission will give the driver the option of selecting the desired gear while driving, known as Autostick Shifting. The shifter will usually either have a + ahd - button on it, or shift side to side when in Drive. If the downshift switch does not function correctly, code P0957 will set and the Autostick shift function will be disabled. engine code P0957P0957 fixobd P0957dtc P0957obd code P0957obd2 P0957P0957 car codediagnostic code P0957car code P0957check engine code P0957fehlercode P0957P0957 fiatcodigo P0957codigo falla P0957P0957 kody b??dówcodigo de falla P0957 What are the common causes of P0957 ? Faulty Auto Shift Manual Switch Auto Shift Manual Switch harness is open or shorted Auto Shift Manual Switch circuit poor electrical connection How do you troubleshoot P0957 ? If the scan tool has that capability, and the scan tool can operate the IMRC valves, then the problem is either resolved and a simple code clearing is all that's left or a new PCM would be called for. With the valve disconnected, the red voltmeter lead should be attached to the IMRC valve power wire and the black voltmeter lead connected to ground. If the engine displays a miss and there wasn't a code, determine which cylinder is misfiring. If the exhaust manifold is visible, spay or pour a small amount of water on each cylinder exhaust port. Water will evaporate immediately on good cylinders and slowly on the missing cylinder. If this can't be accomplished pull the plugs and check the condition. Searches related to P0957 - Auto Shift Manual Mode Circuit Low p0957 dodge caravan p0597
