VAPS Solenoid Actuator Return Circuit Failure
Diagnostic trouble code C1925 indicates a fault in the return circuit of the Variable Assist Power Steering (VAPS) solenoid actuator. The VAPS system electronically adjusts hydraulic steering assist based on vehicle speed. The control module sends a signal to the solenoid to regulate steering pressure and monitors the return circuit for electrical integrity. When the module detects an electrical anomaly—such as an open circuit, short to voltage, or short to ground—in the actuator return line, this manufacturer-specific code is set.
1. Commonly Affected Makes
2. Most Common Causes
- Damaged or internally shorted VAPS actuator solenoid
- Open or shorted wiring in the return circuit
- Corroded, bent, or poorly connected electrical connector
3. Symptoms You Will Notice
- Inconsistent or no power steering assist
- Steering feels heavy at low speeds or overly light at high speeds
- Check Engine Light or power steering warning light illuminated
4. Step-by-Step Diagnosis
Scan for additional codes and verify C1925 is present
Inspect the VAPS solenoid connector and wiring for damage, corrosion, or loose pins
Test the solenoid resistance and check for shorts or opens using a multimeter
Check for battery voltage and ground at the solenoid connector with the ignition on
If wiring and solenoid test OK, suspect a faulty PSCM and perform further module diagnostics
5. Frequently Asked Questions
Is it safe to drive?▼
You can drive short distances, but steering assist may be unpredictable. Have it diagnosed promptly to avoid loss of power steering.
How much does it cost to fix?▼
Repair costs typically range from $150 to $600, depending on whether the issue is a simple wiring repair or requires replacing the solenoid or control module.