What Does P1773 Mean?
The transmission hydraulic pressure sensor is reading higher than expected values. This indicates either actual excessive pressure or a faulty sensor reading.
Common Causes
40%
Failed hydraulic pressure sensor reading incorrectly high
30%
Stuck pressure regulator valve causing actual high pressure
15%
Contaminated transmission fluid causing valve sticking
15%
Shorted wiring in pressure sensor circuit causing false high reading
Diagnostic Steps
1
Step 1: Check transmission fluid level and condition; replace if contaminated or burnt
2
Step 2: Connect mechanical pressure gauge to transmission and compare to sensor reading
3
Step 3: If mechanical gauge shows normal pressure, replace pressure sensor
4
Step 4: If actual pressure is high, inspect and clean or replace pressure regulator valve
5
Step 5: Perform transmission fluid and filter service if contamination is present
Estimated Repair Cost
$200 - $1,200
Parts + labor, varies by vehicle and location
The transmission hydraulic pressure sensor is reading higher than expected values. This indicates either actual excessive pressure or a faulty sensor reading.
The most common cause of P1773 (Hydraulic Pressure Sensor 1 Too High) is: Failed hydraulic pressure sensor reading incorrectly high
Typical repair costs for P1773 range from $200 to $1,200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
High transmission pressure can cause harsh shifting and accelerated clutch wear. Prolonged operation may lead to transmission seal failure or internal damage.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1773 to identify the root cause.
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Quick Info
Category
Powertrain
System
Transmission Hydraulic System
Difficulty
Type
Manufacturer
Recommended Tools
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