Blown fuse or fusible link supplying the ABS valve circuit; Corroded, loose, or damaged wiring or connector at the ABS module or valve body; Open or high-resistance circuit in the supply voltage wire to the ABS valve solenoids; Faulty ABS control module or valve body assembly; Poor ground connection for the ABS module or valve body; Low system voltage due to a weak battery or charging system issue

DTC codes / C05xx · Brakes, steering and suspension / C053B

C053BABS Valves Supply Voltage Circuit/Open

Q: What does code C053B mean?

ABS Valves Supply Voltage Circuit/Open. C053B indicates that the anti-lock brake system (ABS) control module has detected a problem with the supply voltage circuit for the ABS solenoid valves, such as an open circuit, low voltage, or high resistance. The module monitors the voltage feed to the valve solenoids and sets this code when the voltage falls outside the expected range during self-test or operation. This can prevent the ABS from activating and may disable the stability control system.

C053B indicates that the anti-lock brake system (ABS) control module has detected a problem with the supply voltage circuit for the ABS solenoid valves, such as an open circuit, low voltage, or high resistance. The module monitors the voltage feed to the valve solenoids and sets this code when the voltage falls outside the expected range during self-test or operation. This can prevent the ABS from activating and may disable the stability control system.

SystemChassis

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaBrakes, steering and suspension

Symptoms you may notice

ABS warning light illuminated on the dashboard
Traction control or stability control warning light also on
ABS and traction control systems may be disabled, reducing braking safety in slippery conditions
Often no symptoms besides the warning light
In some cases, a soft or inconsistent brake pedal feel if the valve supply is intermittent

Common causes, most likely first

Blown fuse or fusible link supplying the ABS valve circuit
Corroded, loose, or damaged wiring or connector at the ABS module or valve body
Open or high-resistance circuit in the supply voltage wire to the ABS valve solenoids
Faulty ABS control module or valve body assembly
Poor ground connection for the ABS module or valve body
Low system voltage due to a weak battery or charging system issue

How to diagnose and fix it

Check the ABS fuses and relays in the underhood fuse box and replace any blown fuse
Inspect the wiring harness and connectors at the ABS module and valve body for corrosion, damage, or looseness
Measure battery voltage and charging system output to rule out low supply voltage
Use a multimeter to check for continuity and voltage drop on the supply circuit to the ABS valve solenoids
Check and clean the ABS module ground connections
If the circuit is intact, test the ABS valve body solenoids for resistance and compare to specifications
Replace the ABS control module or valve body if internal failure is confirmed

Don't overlook the simple electrical checks

A weak battery or failing alternator can cause this code because the ABS module is sensitive to low voltage during cranking or high electrical load.
Corrosion inside a connector that looks fine from the outside is a common cause, so always perform a voltage drop test under load rather than just a visual inspection.
The code can set intermittently due to a chafed wire that only shorts when the vehicle hits a bump or the engine moves, so wiggle-test the harness while monitoring live data.
Replacing the ABS module without checking the supply circuit first is a costly misdiagnosis, as the module is often not the root cause.
Some vehicles require a relearn or calibration procedure after replacing the ABS module or valve body, which a generic scan tool may not support.

Can I keep driving with C053B?

You can usually drive the vehicle with this code, but the ABS and traction control systems may be disabled, so avoid hard braking or slippery conditions. Have the fault diagnosed promptly to restore full braking safety.

Tools that help

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Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.