Transmission Slip Error
2012-2018 Ford Focus Electric Electric Motor
Description
The PCM/TCM has detected excessive transmission slip. The actual gear ratio does not match the expected ratio, indicating the transmission is slipping during operation.
Symptoms
- Check Engine Light
- Transmission slipping during acceleration
- RPM flare between shifts
- Harsh shifting
- Reduced fuel economy
- Transmission overheating
Common Causes
- Low transmission fluid
- Worn clutch packs
- Faulty shift solenoids
- Valve body issue
- Torque converter failure
- Contaminated transmission fluid
Diagnostic Steps
- Check transmission fluid level and condition (color, smell)
- Monitor transmission slip with scan tool
- Check line pressure
- Inspect shift solenoid operation
- Perform transmission fluid and filter service
Repair Notes
Check fluid level first. Perform fluid and filter service. If slip persists, internal transmission repair or rebuild likely needed.
Related Codes
Other Powertrain Codes
- P0070Ambient Air Temperature Sensor Circuit
- P0071Ambient Air Temperature Sensor Range/Performance
- P0072Ambient Air Temperature Sensor Circuit Low
- P0073Ambient Air Temperature Sensor Circuit High
- P0115Engine Coolant Temperature (ECT) Sensor 1 Circuit
- P0116ECT Sensor 1 Circuit Range/Performance
- P0117ECT Sensor 1 Circuit Low Input
- P0118ECT Sensor 1 Circuit High Input
- P0119ECT Sensor 1 Circuit Intermittent
- P0125Insufficient Coolant Temperature for Closed Loop Fuel Control
P1728 on Other Vehicles
Common Questions
What does code P1728 mean on a 2012-2018 Ford Focus Electric?
P1728 stands for "Transmission Slip Error". The PCM/TCM has detected excessive transmission slip. The actual gear ratio does not match the expected ratio, indicating the transmission is slipping during operation.
What are the symptoms of P1728 on a Ford Focus Electric?
Common symptoms of P1728 include: Check Engine Light, Transmission slipping during acceleration, RPM flare between shifts, Harsh shifting, Reduced fuel economy, Transmission overheating.
What causes P1728 on a 2012-2018 Ford Focus Electric?
Common causes of P1728 include: Low transmission fluid, Worn clutch packs, Faulty shift solenoids, Valve body issue, Torque converter failure, Contaminated transmission fluid.