What this code means

The ABS hydraulic pump motor runs continuously or for an excessive duration.

Symptoms

• ABS pump motor audible constantly
• ABS light may be on
• Battery drain if vehicle is off
• Brake pedal feels spongy

Common causes

• Internal hydraulic leak in ABS modulator
• Faulty pressure switch
• ABS module commanding pump continuously
• Leaking accumulator or valve

Diagnostic steps

1. Monitor pump run time with scan tool
2. Check brake fluid level at ABS unit
3. Inspect for external brake fluid leaks
4. Test pressure switch
5. Check for related solenoid valve codes

Repair notes

Diagnose the cause of continuous pump run. Replace modulator if internal leak.

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