A P2709 DTC is used to indicate a problem with one of the shift solenoid that is labeled ‘F’. These small electromechanical devices are used to move pressurized hydraulic fluid throughout the valve body, for the purposes of actuating a gear change. If an electrical fault is detected, a P2709 diagnostic trouble code will be set.
What Transmission Do I Have?
How Serious is the Code?
The electrical fault with a transmission shift solenoid means that the computer cannot control the solenoid it needs to. So having a P2709 DTC means that you will have a serious performance issues with your vehicle.
Symptoms
Symptoms of a P2709 include:
- Harsh shifts
- Slipping
- Delayed gear changes
- Transmission overheating
- Poor performance
- Limp mode
Causes
- Dirty transmission fluid
- Clogged transmission filter
- Damaged wiring/connectors
- Blocked hydraulic passages inside the valve body
- Failed shift solenoid
- Programming issues with the ECU/TCM
How to Diagnose the Code?
When diagnosing a P2709 OBDII diagnostic trouble code, the condition of the transmission fluid should be assessed, the manufacturer’s TSBs should be considered as well. If no issues are found, then the wiring and connectors on the transmission wiring harness should be inspected. Should no problems can be found there, further diagnosis of the solenoids and valve body will be required.
What Transmission Do I Have?
What Repairs Will Fix P2709?
- Service the transmission
- Repair damaged wiring
- Update TCM programming
- Replace shift solenoid
Related Codes
P2706 – Shift Solenoid F
P2707 – Shift Solenoid F Electrical Perf or Stuck Off
P2708 – Shift Solenoid F Stuck On
P2710 – Shift Solenoid F Intermittent
