Ford DTC P1784 – Transmission system problems
DTC P1784 meaning on Ford
DTC P1784 on Ford vehicles indicates a problem with the transmission system. This code specifically points to an issue with the transmission control switch circuit.
Ford DTC P1784 symptoms
- Check Engine Light (CEL) illuminated on the dashboard
- Transmission may not shift properly
- Vehicle may go into “limp mode” for safety
Ford DTC P1784 causes
- Faulty transmission control switch
- Wiring issues in the transmission control circuit
- Corrosion or poor connections in the circuit
Ford DTC P1784 seriousness
The seriousness of DTC P1784 lies in the potential transmission operation issues it can cause. Ignoring this code can lead to further damage to the transmission system and affect the overall drivability of the vehicle.
How to diagnose DTC P1784 on Ford
- Use a diagnostic scanner to retrieve the trouble codes
- Inspect the transmission control switch and its wiring for any visible damage
- Check for corrosion or loose connections in the circuit
How to fix DTC P1784 on Ford
- Replace the faulty transmission control switch if necessary
- Repair any damaged wiring or connections in the circuit
- Clear the trouble codes and test drive the vehicle to ensure the issue is resolved
How to erase DTC P1784 on Ford
- Use a diagnostic scanner to clear the trouble codes
- Ensure the underlying issue causing the DTC has been addressed
- Perform a final check to confirm the code has been successfully erased
Recommended tools for Ford diagnostics
Explore our expert picks: The Best OBD2 Scanners for 2025
Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter
Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.