P07CF: Transmission Mode Switch D Circuit Low
Standardized SAE J2012 code · P07xx — Transmission
What does P07CF mean?
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. P07CF means the signal of mode switch D is below its lower limit – a short to ground or a button stuck against ground. The opposite is P07D0.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Symptoms
- Mode D cannot be selected or stays active
- Mode indicator missing or flashing
- Transmission stays on the normal program
Common causes
- High Signal wire shorted to ground
- Medium Button stuck pressed (switching to ground)
- Medium Moisture or dirt in the button
- Low Control module
Likelihood is a general estimate across vehicles; your make and model may differ.
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