Damaged or corroded wiring or connector at the ABS pump motor or solenoid valve; Faulty ABS pressure modulation solenoid valve; Failed ABS control module; Blown fuse or relay supplying power to the ABS pump; High resistance or open circuit in the PWM control wire; Poor ground connection for the ABS system

DTC codes / C02xx · Brakes, steering and suspension / C0244

C0244PWM Brake Pressure Modulation Circuit

Q: What does code C0244 mean?

PWM Brake Pressure Modulation Circuit. C0244 indicates that the antilock braking system (ABS) control module has detected a fault in the pulse-width-modulated (PWM) brake pressure modulation circuit, which controls the solenoid valves that adjust hydraulic pressure during ABS operation. The module monitors the circuit for abnormal voltage or current and sets this code when the signal does not match expected values.

C0244 indicates that the antilock braking system (ABS) control module has detected a fault in the pulse-width-modulated (PWM) brake pressure modulation circuit, which controls the solenoid valves that adjust hydraulic pressure during ABS operation. The module monitors the circuit for abnormal voltage or current and sets this code when the signal does not match expected values.

SystemChassis

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyProfessional

AreaBrakes, steering and suspension

Symptoms you may notice

ABS warning light illuminated on the dashboard
Traction control or stability control warning light may also be on
Often no symptoms besides the warning light
ABS may be disabled, leading to wheel lockup during hard braking
Intermittent or reduced ABS performance in slippery conditions
Possible unusual noises from the ABS hydraulic unit during activation

Common causes, most likely first

Damaged or corroded wiring or connector at the ABS pump motor or solenoid valve
Faulty ABS pressure modulation solenoid valve
Failed ABS control module
Blown fuse or relay supplying power to the ABS pump
High resistance or open circuit in the PWM control wire
Poor ground connection for the ABS system

How to diagnose and fix it

Inspect the ABS fuse and relay, replacing if blown or faulty
Check the wiring harness and connectors at the ABS pump and control module for damage or corrosion
Measure resistance and voltage on the PWM control circuit to verify continuity and signal integrity
Test the ABS pressure modulation solenoid for proper resistance and operation
If the solenoid is faulty, replace the ABS hydraulic unit or solenoid as required
If the control module is defective, replace and reprogram the ABS module
Clear the code and perform a road test to verify the repair

Before replacing the ABS module

A weak battery or charging system fault can cause the ABS module to set C0244 due to low voltage during self-test.
Corroded ground connections on the ABS pump can mimic a failed module, so always check grounds before condemning parts.
The PWM signal is sensitive to aftermarket electrical accessories or poor wiring repairs, which can introduce interference.
C0244 can be set by a sticking solenoid valve that only acts up when cold, so intermittent symptoms may not appear during a warm shop inspection.
Some vehicles require a scan tool to bleed the ABS system after service, and trapped air can trigger pressure modulation codes.

Can I keep driving with C0244?

You can usually drive the vehicle with the ABS light on, but the ABS system may be disabled, increasing stopping distance in emergencies. Avoid hard braking on slippery surfaces and 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.