What Does C1923 Mean?
The steering module has detected a short-to-battery condition in the VAPS solenoid actuator output circuit. A voltage source is feeding the output wire, causing the solenoid to be energized beyond the module's control. This typically causes maximum steering assist (very light effort) regardless of vehicle speed.
Common Causes
40%
Chafed VAPS output wire contacting a 12V power feed in the engine bay harness
25%
Internal solenoid fault with output coil shorted to the supply terminal
25%
Power steering fluid contamination in the solenoid connector creating a conductive bridge
10%
Module output driver failure on the VAPS channel
Diagnostic Steps
1
Step 1: Disconnect the VAPS solenoid and check for voltage on the output wire (key on). Voltage present confirms wiring short.
2
Step 2: Measure resistance from the output wire to B+ and other power wires to identify the short.
3
Step 3: Inspect the harness near the steering gear, power steering pump, and engine for chafing and melted insulation.
4
Step 4: Check the solenoid connector for power steering fluid leaks contaminating the terminals.
5
Step 5: Repair the short and verify proper speed-sensitive steering assist returns during a road test.
Estimated Repair Cost
$100 - $600
Parts + labor, varies by vehicle and location
The steering module has detected a short-to-battery condition in the VAPS solenoid actuator output circuit. A voltage source is feeding the output wire, causing the solenoid to be energized beyond the module's control. This typically causes maximum steering assist (very light effort) regardless of v...
The most common cause of C1923 (VAPS Solenoid Actuator Output Circuit Short To Battery) is: Chafed VAPS output wire contacting a 12V power feed in the engine bay harness
Typical repair costs for C1923 range from $100 to $600, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Maximum constant steering assist makes the steering dangerously light at highway speeds, significantly reducing road feel and increasing the risk of overcorrection during lane changes or emergency maneuvers.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to C1923 to identify the root cause.
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Quick Info
Category
Chassis
System
Variable Assist Power Steering (VAPS)
Difficulty
Type
Manufacturer
Recommended Tools
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