What does it mean?
P1719 is a Powertrain (engine, transmission, fuel system) fault code. It indicates: A/T Skip Shift Solenoid Control Circuit Malfunction .
Symptoms
- MIL on
- Skip shift lockout no longer working, or locking out gears when it should not
- Shift indicator lamp behaving incorrectly
- Driver forced into an unexpected gear during light throttle acceleration
- No other driveability complaint in many cases
- Fault that appears only when the function should be active
Likely causes
- Open winding or internal short in the skip shift solenoid
- Open, shorted or high-resistance wiring in the solenoid control circuit
- Corroded or disconnected solenoid connector, which sits exposed near the transmission
- Blown fuse or lost supply voltage to the solenoid
- Module output driver failure
- Harness chafing where the loom runs along the transmission or close to the exhaust
- Solenoid mechanically stuck from debris, varnish or corrosion
How to fix it
- Command the solenoid on and off with the scan tool and listen or feel for it clicking
- Measure the solenoid winding resistance at its connector and compare with the specification
- Check the supply fuse and confirm battery voltage reaches the solenoid with the ignition on
- Test the control circuit for continuity to the module and for a short to ground
- Inspect the connector and harness for corrosion, chafing and heat damage from the exhaust
- Replace the solenoid if it is electrically open or will not respond to a command
- Repair the harness section, and consider the module output driver only after the circuit tests good