Electric/Auxiliary Transmission Fluid Pump A Motor Supply Voltage Circuit/Open
The supply voltage circuit of auxiliary transmission fluid pump A motor reports a open condition.
Affected components
- Aux trans pump a motor
- Wiring harness
- Tcm
Common causes
- High likelihood: Open in supply wire
- Medium likelihood: Supply fuse blown
- Low likelihood: Pin pushed back out of connector body
Possible symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
Diagnostic notes
- The malfunction indicator lamp may illuminate
- Reduced-power or limp mode may occur
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.