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2020 CADILLAC XT6
3.6L V6•FWD•AUTOMATIC•gas
4 active safety recalls on this vehicle — view recalls
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Repairs0Labor473Torque3265Fluid7DTC2012Battery1Maintenance0Recalls4
P0957moderate severityPowertrain

Auto Shift Manual Mode Circuit Low

on 2020 Cadillac XT6 3.6L V6 · FWD

What this code means

The automatic shift manual mode circuit is reading a lower than expected voltage. This suggests a short to ground or open in the mode circuit wiring.

Symptoms

  • Manual mode does not engage
  • Transmission stuck in auto mode
  • Warning light illuminated

Common causes

  • Short to ground in wiring
  • Faulty mode selector switch
  • Corroded connector pins
  • Failed transmission control module

Diagnostic steps

  1. Scan for stored codes
  2. Measure circuit voltage at connector
  3. Inspect wiring for shorts to ground
  4. Test switch resistance
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