What Does P1764 Mean?
The transmission governor pressure sensor voltage is reading below the expected range. This prevents the TCM from accurately monitoring transmission hydraulic pressure for proper shift control.
Common Causes
40%
Failed governor pressure sensor with internal open circuit
30%
Open circuit or high resistance in sensor wiring or ground
20%
Corroded or loose sensor connector terminals
10%
TCM power supply issue or internal module fault
Diagnostic Steps
1
Step 1: Backprobe governor pressure sensor connector and measure voltage with key on, engine off (should read approximately 5V reference)
2
Step 2: Check sensor ground circuit for continuity to chassis/battery ground
3
Step 3: Inspect sensor connector for corrosion, pushed-back pins, or moisture intrusion
4
Step 4: Measure sensor output voltage at idle and compare to specification (typically 0.5-4.5V variable)
5
Step 5: If sensor receives proper reference voltage but output is low, replace sensor; if no reference voltage, diagnose TCM circuit
Estimated Repair Cost
$150 - $750
Parts + labor, varies by vehicle and location
The transmission governor pressure sensor voltage is reading below the expected range. This prevents the TCM from accurately monitoring transmission hydraulic pressure for proper shift control.
The most common cause of P1764 (Governor Pressure Sensor Voltage Too Low) is: Failed governor pressure sensor with internal open circuit
Typical repair costs for P1764 range from $150 to $750, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Transmission may shift erratically, enter limp mode, or experience slipping. Continued driving may cause internal transmission damage.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1764 to identify the root cause.
OBDHut Mobile App
Scan codes directly from your car with the OBDHut app.
Coming Soon
Quick Info
Category
Powertrain
System
Automatic Transmission
Difficulty
Type
Manufacturer
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
