What Does P1734 Mean?
The transmission pressure control solenoid B has an electrical fault. This solenoid regulates hydraulic pressure for specific transmission clutch packs or gear operations. An electrical issue prevents proper pressure control, affecting shift quality and transmission function.
Common Causes
35%
Faulty pressure control solenoid B internal short or open circuit
30%
Damaged or corroded wiring harness or connector to solenoid B
20%
Low transmission fluid causing solenoid overheating and failure
10%
Transmission control module (TCM) internal fault
5%
Corroded or loose ground connection in transmission circuit
Diagnostic Steps
1
Step 1: Visually inspect transmission wiring harness and connectors for damage, corrosion, or loose connections
2
Step 2: Check transmission fluid level and condition; top off or replace if needed
3
Step 3: Measure resistance of pressure control solenoid B according to manufacturer specifications
4
Step 4: Test solenoid power and ground circuits with multimeter for proper voltage and continuity
5
Step 5: If all circuits test good, replace pressure control solenoid B and retest
Estimated Repair Cost
$200 - $600
Parts + labor, varies by vehicle and location
The transmission pressure control solenoid B has an electrical fault. This solenoid regulates hydraulic pressure for specific transmission clutch packs or gear operations. An electrical issue prevents proper pressure control, affecting shift quality and transmission function.
The most common cause of P1734 (Pressure Control Solenoid "B" Electrical) is: Faulty pressure control solenoid B internal short or open circuit
Typical repair costs for P1734 range from $200 to $600, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle may experience harsh shifts, slipping, or transmission may enter limp mode. Continued driving can cause further transmission damage.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1734 to identify the root cause.
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Quick Info
Category
Powertrain
System
Automatic Transmission
Difficulty
Type
Manufacturer
Recommended Tools
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