P26E7 code meaning
Actuator Supply Voltage D Circuit/Open
Powertrain system Generic code P26xx codes Check engine light
What P26E7 means
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.
P26E7 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyHard
- Typical labor1 to 5 hours
- Clears after repairAfter a drive cycle
Symptoms of P26E7
- 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
Common causes of P26E7
- Most 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
- Less likelyInternal fault in the high-side output of the transmission control module
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Actuator supply dControl moduleWiring harness
What each part of P26E7 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 6 | Area: computer (engine control module) and output circuits. |
| E7 | The exact fault in that area. |
What to do next
- Note P26E7 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 P26E7
What does P26E7 mean?
P26E7 means "Actuator Supply Voltage D Circuit/Open". 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). It is a generic code, so it means the same on every make.
Is it safe to drive with P26E7?
Drive gently and only to a workshop. With P26E7 the car can go into limp mode (reduced power) to protect itself.
Will P26E7 fail an emissions test?
Yes, it can. P26E7 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P26E7 to fix?
Difficulty: hard. A typical repair takes 1 to 5 hours of work. This is a job for a workshop.
Will P26E7 clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.