P0747 on Cadillac
Pressure Control Solenoid Stuck On
P0747 on Cadillac vehicles indicates pressure control solenoid stuck on. Au7o has documented this code across 2 Cadillac models — most commonly on CT5, Escalade ESV. This transmission code means the pressure control solenoid 'A' is stuck in the on (or fully applied) position, or its circuit behaves as if permanently energized. This solenoid regulates hydraulic line pressure that controls clutches and shift feel inside the automatic transmission. When it stays on, line pressure can't be modulated properly, leading to harsh shifts, slipping, overheating, or the transmission being stuck in a gear or limp mode. It points to the solenoid, its wiring, or a hydraulic/contamination problem in the valve body. Typical repair costs on Cadillac range from $450 to $6,500, depending on the specific model and root cause.
Common Causes of P0747
- •Stuck or failed pressure control solenoid
- •Dirty or contaminated transmission fluid blocking the valve
- •Debris stuck in the valve body bore
- •Shorted or chafed solenoid wiring
- •Corroded or loose solenoid connector
- •Low or degraded transmission fluid
- •Faulty transmission control module (less common)
P0747 on Cadillac by Model
Cadillac CT5(1 issue)
- 10L80 Harsh Shifts and Check Engine Light with DTC P2812 or P2814 (Line Pressure Solenoid)2020-2021
Owners of 2020-2021 Cadillac CT5 and CT5-V models equipped with the GM Hydra-Matic 10L80 10-speed automatic report harsh, abrupt shifts accompanied by an illuminated check engine light. GM Preliminary Information bulletin PIP5799 documents an electrical fault in Transmission Control Solenoid Valve 7 (the line pressure solenoid) that stores DTC P2812 or P2814 in the TCM. Separately, NHTSA Safety Recall N242480630 (NHTSA 25V148) covers TCM monitoring software for a related transmission control valve wear condition that, in rare cases, can cause momentary wheel lock-up. A related Special Coverage bulletin (N242480631) extends warranty for the P0747 control-valve condition to 15 years / 150,000 miles. Note: the 2020-2021 CT5 does not include the CT5-V Blackwing (introduced for MY2022 with the 10L90), which is NOT part of this recall population.
Cadillac Escalade ESV(1 issue)
- 10-Speed 10L80/10L90 Harsh Shifting, Shudder, and Valve Body Control Solenoid Issues2021-2025
Owners have reported harsh 1-2 or 2-1 shifts, delayed engagement, shudder, and transmission warning messages on the current-generation Escalade ESV. GM service information and field reports point to valve body/control solenoid faults, internal transmission control valve issues, and software calibration concerns on 10-speed units used in full-size SUVs. Some vehicles require valve body replacement, while others progress to more extensive transmission repair.
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View P0747 across all makes →Frequently Asked Questions
What does P0747 mean on Cadillac?▼
P0747 stands for "Pressure Control Solenoid Stuck On." This transmission code means the pressure control solenoid 'A' is stuck in the on (or fully applied) position, or its circuit behaves as if permanently energized. This solenoid regulates hydraulic line pressure that controls clutches and shift feel inside the automatic transmission. When it stays on, line pressure can't be modulated properly, leading to harsh shifts, slipping, overheating, or the transmission being stuck in a gear or limp mode. It points to the solenoid, its wiring, or a hydraulic/contamination problem in the valve body. On Cadillac specifically, this code is documented across 2 models.
What causes P0747 on Cadillac vehicles?▼
Common causes on Cadillac: Stuck or failed pressure control solenoid, Dirty or contaminated transmission fluid blocking the valve, Debris stuck in the valve body bore, Shorted or chafed solenoid wiring, Corroded or loose solenoid connector. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0747 on a Cadillac?▼
Repair costs on Cadillac range from $450 to $6,500, depending on the specific model and root cause.
Which Cadillac models have P0747 documented?▼
Au7o has documented P0747 on 2 Cadillac models: CT5, Escalade ESV.