Power Steering Pressure Sensor/Switch Circuit

What it means

The engine computer has detected an improper signal from the hydraulic power steering pressure sensor or switch. The computer uses this signal to raise idle speed slightly when the wheel is turned, because the steering pump adds load to the engine.

Related codes: P0505P0506P0507

Symptoms3

• Engine speed drops or the engine stalls when turning the wheel hard at a stop or while parking.
• Engine shake when steering at low speed.
• Check engine light on.

Possible causes5

• Failed power steering pressure sensor or switch.
• Power steering fluid leaking from the sensor into its connector.
• Open or shorted wiring.
• Corroded or loose connector.
• Low fluid or a weak pump causing abnormal pressure.

How to diagnose4

1. Check the power steering fluid level and look for leaks around the sensor.
2. Watch the sensor status on a scan tool while turning the wheel lock to lock; the reading should change.
3. Inspect the connector and wiring for fluid or corrosion.
4. Measure the sensor signal or switch continuity and compare with the manufacturer specification.

How to fix5

1. Top up the steering fluid and repair any leak.
2. Clean or replace the connector.
3. Repair damaged wiring.
4. Replace the power steering pressure sensor or switch.
5. Clear the codes, turn the wheel at a stop and confirm engine speed stays steady.

Repair cost

In Saudi riyals; the highlighted part is the expected range for this fault.

The cost is usually low because the sensor is cheap; it rises if it leaks fluid and the connector needs replacing or fluid must be added.

Prices are rough estimates for common cars at independent workshops and vary with the car and the source of the part.
Prices last updated: September 2026

Frequently asked questions