P07D0
Transmission Mode Switch D Circuit High
Generic OBD-II
Common symptoms
What you'll notice
- Check the wiring and connections related to the transmission mode switch
- Inspect the transmission mode switch for any signs of damage or malfunction
- Test and calibrate the transmission mode switch to ensure proper operation
- Replace the transmission mode switch if necessary
- Consult the vehicle manufacturer's technical service bulletins for any known issues or recommended solutions for the specific error code
Common causes
Most likely first
- Faulty transmission mode switch
- Loose or corroded electrical connections related to the transmission mode switch
- Malfunctioning transmission control module
- Low transmission fluid level
- Internal transmission damage
How to diagnose & fix
Work through it in order
- Difficulty shifting gears
- Harsh or delayed shifting
- Transmission staying in a single gear
- False or erratic shifting
- Illuminated transmission warning light
Read & clear P07D0 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.