C0067high severityChassis
ABS Pump Motor Runs Continuously
on 2016 Mazda MX-5 Miata 2.0L I4 · RWD
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
- Monitor pump run time with scan tool
- Check brake fluid level at ABS unit
- Inspect for external brake fluid leaks
- Test pressure switch
- Check for related solenoid valve codes
Repair notes
Diagnose the cause of continuous pump run. Replace modulator if internal leak.
Other Chassis codes on this vehicle
C0021
LF Wheel Speed Sensor Range/Performance
C0022
RF Wheel Speed Sensor Range/Performance
C0023
LR Wheel Speed Sensor Range/Performance
C0024
RR Wheel Speed Sensor Range/Performance
C0025
LF Wheel Speed Sensor Circuit Intermittent
C0026
RF Wheel Speed Sensor Circuit Intermittent
C0027
LR Wheel Speed Sensor Circuit Intermittent
C0028
RR Wheel Speed Sensor Circuit Intermittent
C0035
Left Front Wheel Speed Sensor Circuit
C0036
Left Front Wheel Speed Signal Erratic