P2812 code meaning
Pressure Control Solenoid G Control Circuit/Open
Powertrain system Generic code P28xx codes Check engine light
What P2812 means
P2812 signals an open control circuit of solenoid G. GM uses it widely: on the 2016 eight-speed (TCC valve) the hardware open flag must stand for 0.3 s of 0.5 s, one trip; the 2020 table, now with the ten-speed line pressure valve as well, asks for 0.6 s of 0.65 s and rates it Type B; on the 2023 Corvette dual-clutch box it is the limited-slip valve, detected by a driver chip test with the output off and confirmed after 150 ms. GM's PIP5799 replaces the 10L valve body when normal diagnosis finds nothing. Ford's 2024 summary books the open load of the even clutch cooling valve on the TR9070 dual-clutch box as P2812. Harsh shifts or lost converter lockup follow.
P2812 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor1 to 6 hours
- Clears after repairAfter a drive cycle
Symptoms of P2812
- Check engine light on
- Harsh shifts on line pressure designs
- No converter lockup or limited-slip function
Common causes of P2812
- Most likelyOpen coil in solenoid G or in the valve body assembly
- PossibleOpen terminal or corroded pin in the transmission connector
- PossibleBroken wire between module and solenoid
- Less likelyFaulty output driver in the control module
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Pressure control solenoid gWiring harness
What each part of P2812 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 8 | Area: transmission. |
| 12 | The exact fault in that area. |
What to do next
- Note P2812 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 P2812
What does P2812 mean?
P2812 means "Pressure Control Solenoid G Control Circuit/Open". P2812 signals an open control circuit of solenoid G. It is a generic code, so it means the same on every make.
Is it safe to drive with P2812?
Drive gently and only to a workshop. With P2812 the car can go into limp mode (reduced power) to protect itself.
Will P2812 fail an emissions test?
Yes, it can. P2812 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 P2812 to fix?
Difficulty: workshop only. A typical repair takes 1 to 6 hours of work. This is a job for a workshop.
Will P2812 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.