What Does C1933 Mean?
The chassis control module has detected that the solenoid current draw is outside the expected operating range. This applies to an electronically controlled solenoid in the suspension, steering, or braking system, and indicates the solenoid is drawing too much or too little current compared to the module's commanded value. This suggests either a failing solenoid, wiring degradation, or a hydraulic/pneumatic load issue.
Common Causes
35%
Partially shorted solenoid coil with reduced winding resistance causing excessive current draw
30%
High-resistance wiring or connector causing current drop below the expected range
20%
Mechanical binding in the solenoid valve causing abnormal load on the coil and fluctuating current
15%
Control module internal current sensing circuit out of calibration
Diagnostic Steps
1
Step 1: Identify which solenoid is flagged by checking for companion DTCs that specify a particular corner or system.
2
Step 2: Measure the suspected solenoid's coil resistance. Compare to specification — lower than expected indicates shorted turns, higher indicates degradation.
3
Step 3: Using a current clamp on the solenoid circuit, monitor actual current draw and compare to the module's commanded value in live data. They should match within 10%.
4
Step 4: Check for mechanical issues by manually cycling the solenoid valve (if accessible) to ensure it moves freely without binding.
5
Step 5: Inspect wiring for high-resistance connections, particularly crimps, splices, and connector terminals that may be corroded.
Estimated Repair Cost
$100 - $600
Parts + labor, varies by vehicle and location
The chassis control module has detected that the solenoid current draw is outside the expected operating range. This applies to an electronically controlled solenoid in the suspension, steering, or braking system, and indicates the solenoid is drawing too much or too little current compared to the m...
The most common cause of C1933 (Solenoid Current Out Of Range) is: Partially shorted solenoid coil with reduced winding resistance causing excessive current draw
Typical repair costs for C1933 range from $100 to $600, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Out-of-range solenoid current indicates a degrading component that may fail completely. The affected system (suspension, steering, or braking) may operate unpredictably until the root cause is resolved.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to C1933 to identify the root cause.
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Quick Info
Category
Chassis
System
Chassis Solenoid Control System
Difficulty
Type
Manufacturer
Recommended Tools
OBD2 Scanner
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