The P0957 trouble code relates to the auto shift manual mode circuit, indicating a low voltage condition.
P0957 Auto Shift Manual Mode Circuit Low
Code symptoms P0957.
1. Inability to engage auto shift manual mode.
2. Erratic shifting behavior.
3. Poor transmission performance.
4. The Check Engine Light (CEL) may be illuminated.
Causes of the code P0957.
1. Faulty auto shift manual mode switch.
2. Wiring or connector issues in the auto shift manual mode circuit.
3. Faulty transmission control module (TCM).
4. Electrical issues in the transmission system.
Code Solutions P0957.
1. Test and replace the auto shift manual mode switch if it is faulty.
2. Inspect the wiring and connectors in the auto shift manual mode circuit for any damage, corrosion, or loose connections. Repair or replace any damaged wiring or connectors.
3. Diagnose and replace the faulty transmission control module (TCM) if necessary.
4. Check for other electrical issues in the transmission system and repair as necessary.