P26E7Actuator Supply Voltage D Circuit/Open
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- Supply D is the fourth switched rail with which a control module powers a group of solenoids or other loads, after A (P0657), B (P2669) and C (P2684). P26E7 reports an open load on it. GM's 2023 and 2024 TCM tables assign the code to high-side output 8 and run the check only while the module shuts down: once the output is off and a low-side output on the same load is switched on, the load should pull the line down. If more than 40 % of battery voltage remains, the module keeps the finding in permanent memory and raises the code once it restarts, Type A. Ford's 2024 summary lists P26E7 as the open-load fault of high side driver 8 in the TR9070 dual-clutch gearbox. Everything fed from that rail is without power, so a substitute gear or limp mode is to be expected.
- What you may notice
- Check engine or transmission warning light on
- Transmission stays in a substitute gear or limp mode
- Several solenoid or clutch codes stored at the same time
- Likely causes
- LikelyBroken wire or loose, corroded connector between the module output and the loads on supply D
- PossibleOpen coil in a solenoid powered from this rail
- RareInternal fault in the high-side output of the transmission control module
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €100 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.