P07D4Transmission Mode Switch F Circuit
- Generic OBD-II code · Powertrain
- How the car detects it
- Transmission mode switches select alternative shift programs such as sport, winter, eco or tow/haul; J2012 numbers them A to F without saying which button is which. Switch F is the sixth and last of the family after A (P071A–P071C), B (P071D–P071F), C (P078F, P07CC, P07CD), D (P07CE–P07D0) and E (P07D1–P07D3). No manufacturer document available to us uses switches C to F; GM reads its analog drive mode switch under its own codes (low below 21–29 % of 5 V, high from 94 %, two trips), newer selectors under P05D0–P05D3. P07D4 is the general circuit fault of switch F: its state is invalid or implausible, for example two contacts at once or an in-between value. The program behind it cannot be selected; the MIL normally stays off. Low and high are P07D5/P07D6.
- What you may notice
- Mode F program cannot be selected or stays active
- Mode indicator missing or wrong
- Transmission stays on the normal program
- Likely causes
- LikelySwitch or button faulty or sticking
- PossibleWire or connector open or shorted
- PossibleMoisture or dirt in the switch
- RareControl module input
- Repair
- Easy · Often possible to do yourself.Typical cost: €20 – €250
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.