P0747: Pressure Control Solenoid A Stuck On
What Does P0747 Mean?
P0747 is a diagnostic trouble code indicating: Pressure Control Solenoid A Stuck On. This code relates to the transmission system. It has been reported in NHTSA complaints across 3 different vehicle models.
The automatic transmission is controlled by the TCM using input from speed sensors, temperature sensors, and pressure sensors. When the TCM detects a fault, it may activate limp mode (2nd or 3rd gear only). Shift solenoids are electromagnetic valves inside the valve body controlling hydraulic fluid flow. Modern transmissions use 4-8 solenoids in combination for each gear. Solenoid failures are often caused by contaminated fluid — worn clutch material and degraded fluid create varnish that sticks solenoids. Always check transmission fluid first: level, color (red/pink good, brown/black bad), and smell (burnt = internal damage). Transmission DTCs escalate fast — a $200 solenoid fix can become a $3000-$5000 rebuild if ignored.
Symptoms of P0747
- ⚠️ Check engine/transmission warning light on
- ⚠️ Harsh, delayed, or erratic shifting
- ⚠️ Transmission stuck in one gear (limp mode)
- ⚠️ No upshift or no downshift
- ⚠️ Transmission slipping
- ⚠️ RPM flares between shifts
Common Causes
- 🔍 Faulty shift solenoid
- 🔍 Contaminated transmission fluid
- 🔍 Wiring issue between TCM and solenoid
- 🔍 Valve body wear
- 🔍 TCM internal failure
P0747 Reports by Year
Real Owner Reports
From NHTSA complaint database — actual owner descriptions.
"My 2023 Tahoe with 76,000 miles went into limp mode and activated an engine light. The vehicle was taken to the dealership and had the code P0747 which is pressure control solenoid A is stuck on. The dealership technician is recommending a valve body replacement to repair this problem. This is a kno"
— Chevrolet Tahoe owner, 05/19/2025
"Transmission malfunction. This has appeared several times at highway speeds and low speeds. We have dad to limp along in the slow lane to exit ramp and take back roads to the nearest dealership. The current problem has been confirmed with error codes P0747. The dealership has scanned this vehic"
— Chevrolet Suburban owner, 09/04/2025
"I was driving on an interstate when the vehicle check engine light came on and it went into limp mode causing the vehicle to go into low speed in the middle of traffic. Check engine light code P0747"
— Chevrolet Tahoe owner, 10/18/2025
Source: NHTSA Complaints Database
Most Reported Vehicles for P0747
Based on NHTSA owner complaint data.
| # | Vehicle | Reports |
|---|---|---|
| 1 | CHEVROLET TAHOE | |
| 2 | CHEVROLET SUBURBAN | |
| 3 | NISSAN SENTRA |
P0747 Reports by Vehicle
Detailed NHTSA complaint analysis for each vehicle model.
Diagnostic Tips
- Check fluid level and condition FIRST
- Multiple codes suggest valve body or internal damage
- Monitor solenoid duty cycle with scan tool
- Solenoids often accessible by removing pan
Common Mistakes to Avoid
- ❌ Replacing solenoid without flushing contaminated fluid
- ❌ Using aftermarket fluid instead of manufacturer-specified
- ❌ Driving in limp mode for extended periods
Frequently Asked Questions
What is a shift solenoid?
Can I drive in limp mode?
How much for solenoid replacement?
Can fluid change fix it?
What To Do Next
Possible Fixes
- 🔧 Replace shift solenoid or pack
- 🔧 Transmission fluid flush with manufacturer fluid
- 🔧 Repair wiring to transmission
- 🔧 Replace valve body
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1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
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2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
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Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.