P1747high severityPowertrain
Electronic Pressure Control Solenoid Short Circuit
on 2021 Ford Mustang Mach-E Standard Range Dual Motor AWD · RWD
What this code means
The EPC solenoid has a short circuit. This causes incorrect line pressure in the transmission, leading to harsh shifting or slipping.
Symptoms
- Check Engine Light
- Very harsh shifts
- Transmission bang into gear
- Possible delayed engagement
- Limp mode
Common causes
- EPC solenoid wiring shorted
- Faulty EPC solenoid (internal short)
- Damaged transmission wiring harness
- Corroded connector
Diagnostic steps
- Test EPC solenoid resistance
- Check wiring for shorts to ground or power
- Inspect transmission connector
- Monitor line pressure
Repair notes
Replace EPC solenoid. Repair shorted wiring.
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