C1256critical severityChassis
Accumulator Low Pressure Malfunction
on 2019 Toyota RAV4 2.5L I4 · AWD
What this code means
The brake hydraulic accumulator pressure is below the required threshold. No direct OBD P-code equivalent exists for this manufacturer-specific code.
Symptoms
- Brake warning light on
- ABS warning light on
- Hard or long brake pedal
Common causes
- Faulty accumulator
- Failed pump motor
- Internal hydraulic leak
- Faulty pressure sensor
Diagnostic steps
- Read accumulator pressure with scan tool
- Check pump motor operation
- Inspect hydraulic unit for leaks
- Replace accumulator or actuator
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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