C0231moderate severityChassis
Power Steering Fluid Pressure Low
on 2005 Toyota 4Runner 4.0L V6 · RWD
What this code means
The power steering fluid pressure is below the minimum required for adequate assist.
Symptoms
- Heavy steering especially at low speeds
- Whining noise from power steering pump
- Steering assist reduced
- Fluid foaming visible in reservoir
Common causes
- Low power steering fluid
- Power steering pump wear
- Drive belt slipping
- Power steering hose restriction
- Air in power steering system
Diagnostic steps
- Check fluid level and condition
- Inspect drive belt tension and condition
- Listen for pump cavitation noise
- Check all hoses for leaks or restrictions
- Bleed air from power steering system
Repair notes
Repair leaks and fill fluid. Replace pump if worn. Bleed system of air.
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