P0957: Auto Shift Manual Mode Circuit Low
What to do
If the gearbox has stopped changing up by itself and seems to be holding gears, check whether the dashboard is showing manual mode. A transmission stuck in manual will over-rev if you let it, so watch the rev counter until it is repaired.
What this code means
The manual mode circuit reads below its valid range, normally a short to ground, which the module may read as manual mode being permanently selected. A transmission stuck in manual mode holds whatever gear it was given and will not change up on its own, which is more noticeable than losing the mode entirely.
Likely causes
Start here
- Wiring shorted to ground · moderate
- Faulty transmission mode switch · easy
Less common
- Liquid spilled into the gear selector · moderate
- Corroded or loose connector · easy
Symptoms
Components involved
Information, not instruction
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Community experience
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