Transmission mode switches select alternative shift programs such as sport, winter or tow/haul; the J2012 family runs from A (P071A–P071C) and B (P071D–P071F) to C (base code P078F), D and E. No manufacturer document available to us uses switches C to E; GM reads its analog mode switch under its own codes (low below 21–29 % of 5 V, high from 94 %, two trips) and newer drive mode selectors under P05D0–P05D3. P07D1 is the general circuit fault of a fifth mode switch E: its state is invalid or implausible. Low and high are P07D2/P07D3.
Medium severity. Can I keep driving?Drive gently to a repair shop. If it slips, you hear clunks, or it loses its gears, do not keep driving.
Symptoms
- Mode E cannot be selected or stays active
- Mode indicator missing or flashing
- Transmission stays on the normal program
Most likely causes
- Switch or button faulty or sticking
- Wire or connector open or shorted
- Moisture or dirt in the console
- Control module
What to check, in order
Start with the simplest. You can tick off each step.
Good to know
- Repair difficulty: easy
What each character of P07D1 means
- P: Powertrain: engine and transmission
- 0: Generic code: same on every make
- 7: Transmission
- D1: Specific fault in that system
Frequently asked questions
Can I keep driving with code P07D1?
Drive gently to a repair shop. If it slips, you hear clunks, or it loses its gears, do not keep driving.
What causes code P07D1?
The most common causes are: switch or button faulty or sticking; wire or connector open or shorted; moisture or dirt in the console.
Related codes
- P07D2Transmission Mode Switch E Circuit Low
- P07D3Transmission Mode Switch E Circuit High
- P07CETransmission Mode Switch D Circuit
- P078FTransmission Mode Switch C Circuit
- P05D0Driver Mode Select Switch A Circuit
Sources
Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.