P2729 code meaning
Pressure Control Solenoid E Control Circuit Low
Powertrain system Generic code P27xx codes Check engine light
What P2729 means
P2729 indicates the control line of solenoid E is pulled low, usually by a short to ground. On the Allison 1000 GM detects this when the output connection has almost no impedance to ground and confirms it within 75 ms (Type A). The eight-speed and six-speed tables of 2016 flag the low state for 0.3 s and set it after one trip. For the 2023 Corvette dual-clutch transmission, a sense voltage below roughly 1.7 V with the driver on, held for 150 ms, identifies a ground short at the system pressure pilot valve (Type A); Ford's TR9070 stores its shorted switch case under this number. GM bulletin PIP5646B for 2019-2020 Silverado and Sierra 8L90 shows that P2729 can also come from a failing TCM rather than the harness.
P2729 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2729
- MIL on and fail-safe mode
- Abrupt stop or wheel lock at low speed in the GM 8L90 case
- Limited gear selection
Common causes of P2729
- Most likelyControl wire shorted to ground
- PossibleShorted winding in solenoid E
- PossibleTCM internal failure (GM 8L90)
- Less likelyConductive contamination in the connector
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Pressure control solenoid eWiring harness
What each part of P2729 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 7 | Area: transmission. |
| 29 | The exact fault in that area. |
What to do next
- Note P2729 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 P2729
What does P2729 mean?
P2729 means "Pressure Control Solenoid E Control Circuit Low". P2729 indicates the control line of solenoid E is pulled low, usually by a short to ground. It is a generic code, so it means the same on every make.
Is it safe to drive with P2729?
Drive gently and only to a workshop. With P2729 the car can go into limp mode (reduced power) to protect itself.
Will P2729 fail an emissions test?
Yes, it can. P2729 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 P2729 to fix?
Difficulty: medium. A typical repair takes 0.5 to 5 hours of work. This is a job for a workshop.
Will P2729 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.