P07D6 code meaning
Transmission Mode Switch F Circuit High
What P07D6 means
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. P07D6 means the signal of switch F is above its upper limit – an open circuit at the pulled-up input or a short to positive. The opposite is P07D5.
P07D6 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyEasy, DIY possible
- Typical labor0.3 to 1.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P07D6
- Mode F program cannot be selected or stays active
- Mode indicator missing or wrong
- Transmission stays on the normal program
Common causes of P07D6
- Most likelyWire or connector to the switch open
- PossibleSwitch open internally
- Less likelySignal wire shorted to positive
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Transmission mode switchSwitch wiringTransmission control module
What each part of P07D6 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 7 | Area: transmission. |
| D6 | The exact fault in that area. |
What to do next
- Note P07D6 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P07D6
What does P07D6 mean?
P07D6 means "Transmission Mode Switch F Circuit High". 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. It is a generic code, so it means the same on every make.
Is it safe to drive with P07D6?
P07D6 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will P07D6 fail an emissions test?
P07D6 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is P07D6 to fix?
Difficulty: easy. A typical repair takes 0.3 to 1.5 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P07D6 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.