What Does P1737 Mean?
The torque converter lockup solenoid system has a malfunction. This solenoid controls when the torque converter locks up to eliminate slippage and improve fuel economy. System failure affects fuel economy and transmission operation.
Common Causes
35%
Faulty torque converter lockup solenoid
25%
Damaged wiring or connector to lockup solenoid
20%
Low or dirty transmission fluid affecting solenoid operation
12%
Valve body clogged or damaged affecting hydraulic control
8%
Transmission control module fault
Diagnostic Steps
1
Step 1: Check transmission fluid level and condition; replace if burnt or contaminated
2
Step 2: Inspect lockup solenoid wiring harness and connector for damage or corrosion
3
Step 3: Test lockup solenoid resistance and circuit voltage with multimeter
4
Step 4: Monitor lockup solenoid command and actual operation with scan tool during test drive
5
Step 5: Replace lockup solenoid if electrical tests indicate failure; consider valve body cleaning if solenoid tests good
Estimated Repair Cost
$200 - $800
Parts + labor, varies by vehicle and location
The torque converter lockup solenoid system has a malfunction. This solenoid controls when the torque converter locks up to eliminate slippage and improve fuel economy. System failure affects fuel economy and transmission operation.
The most common cause of P1737 (Lockup Solenoid System) is: Faulty torque converter lockup solenoid
Typical repair costs for P1737 range from $200 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Reduced fuel economy and possible transmission overheating with extended driving. May cause shuddering or vibration during lockup engagement.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1737 to identify the root cause.
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Quick Info
Category
Powertrain
System
Automatic Transmission
Difficulty
Type
Manufacturer
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