What Does C1506 Mean?
The dynamic stability control (DSC/ESC) right rear hydraulic valve has malfunctioned. This solenoid valve controls brake pressure delivery to the right rear wheel during stability control, ABS, and traction control operations. Like the left rear valve, this is critical for oversteer correction and yaw stability. The stability control system will shut down, illuminating both the ABS and ESC/DSC warning lights.
Safety Warning
The stability control system is disabled. The vehicle loses electronic skid prevention for the right rear, which is vital for maintaining directional stability during emergency maneuvers. Normal braking still works, but all advanced braking safety features may be offline. Reduce speed, avoid adverse road conditions, and repair as soon as possible.
Common Causes
35%
Failed right rear DSC solenoid valve in the hydraulic modulator
25%
Circuit board or internal wiring failure in the modulator for right rear valve
20%
Control module valve driver failure for the right rear channel
15%
Contaminated brake fluid or debris in hydraulic passages affecting valve operation
5%
External modulator connector or power supply issue
Diagnostic Steps
1
Use the scan tool's solenoid test function to activate the right rear DSC valve — confirm audible clicks and proper current draw. Compare with a known-good valve's current signature.
2
If accessible, measure the right rear valve solenoid coil resistance at the modulator connector. Compare to manufacturer specification — typically 4–8 ohms.
3
Check all ABS/DSC power supply and ground connections. Perform a voltage drop test across power and ground circuits while the pump motor is activated.
4
Inspect the brake fluid condition and check for particulate contamination by drawing a sample from the modulator bleeder. Dark or gritty fluid indicates system contamination.
5
Verify no recent brake work introduced air into the right rear circuit — air in the ABS modulator can cause erratic valve feedback that the module interprets as a malfunction.
Estimated Repair Cost
$500 - $2,500
Parts + labor, varies by vehicle and location
The dynamic stability control (DSC/ESC) right rear hydraulic valve has malfunctioned. This solenoid valve controls brake pressure delivery to the right rear wheel during stability control, ABS, and traction control operations. Like the left rear valve, this is critical for oversteer correction and y...
The most common cause of C1506 (Dynamic Stability Control Right Rear Valve Malfunction) is: Failed right rear DSC solenoid valve in the hydraulic modulator
Typical repair costs for C1506 range from $500 to $2,500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
The stability control system is disabled. The vehicle loses electronic skid prevention for the right rear, which is vital for maintaining directional stability during emergency maneuvers. Normal braking still works, but all advanced braking safety features may be offline. Reduce speed, avoid adverse road conditions, and repair as soon as possible.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to C1506 to identify the root cause.
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Quick Info
Category
Chassis
System
ABS / Stability Control
Difficulty
Type
Manufacturer
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