What Does P2818 Mean?
The transmission control module detects that pressure control solenoid H is stuck in the on position and cannot be turned off. This creates constant hydraulic pressure where it may not be needed, affecting shift patterns and potentially causing transmission damage.
Common Causes
45%
Mechanically stuck pressure control solenoid H in on position
25%
Shorted solenoid coil or internal short circuit
15%
Transmission control module driver circuit shorted high
10%
Wiring harness short to power in solenoid circuit
5%
Valve body check ball or spring failure causing stuck open valve
Diagnostic Steps
1
Step 1: Measure solenoid resistance and compare to specifications to check for short circuit
2
Step 2: Disconnect solenoid connector and test for voltage at harness side with key on
3
Step 3: Check for short to power in wiring harness using continuity tests to battery voltage
4
Step 4: Command solenoid off with scan tool and verify circuit drops to 0V at solenoid connector
5
Step 5: If electrical tests are normal, remove and bench test solenoid for mechanical sticking
Estimated Repair Cost
$300 - $1,800
Parts + labor, varies by vehicle and location
The transmission control module detects that pressure control solenoid H is stuck in the on position and cannot be turned off. This creates constant hydraulic pressure where it may not be needed, affecting shift patterns and potentially causing transmission damage.
The most common cause of P2818 (Pressure Control Solenoid "H" Stuck On) is: Mechanically stuck pressure control solenoid H in on position
Typical repair costs for P2818 range from $300 to $1,800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
May cause harsh shifts, incorrect gear engagement, or transmission overheating. Vehicle may enter limp mode and should not be driven extensively until repaired.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2818 to identify the root cause.
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Quick Info
Category
Powertrain
System
Automatic Transmission
Difficulty
Type
Generic (SAE)
Recommended Tools
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