Power Steering Pressure Sensor Voltage Too High
Indicates that the power steering pressure sensor is reporting a voltage higher than expected.
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What it means (plain English)
The power steering pressure sensor measures how hard you're turning the steering wheel. This sensor sends back a voltage signal that should be roughly between 0.5 volts and 4.5 volts. If it's over 4.5 volts, the computer thinks something's wrong.
What the computer is actually seeing
The engine control module (ECM) sees the voltage signal from the power steering pressure sensor. In normal operation, the voltage should stay below 4.5 volts. A high signal often indicates a fault with the sensor or wiring.
What a healthy reading looks like
Normal voltage from the power steering pressure sensor should be between 0.5 volts and 4.5 volts, depending on steering conditions.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 11. Inspect the wiring and connectors for the power steering pressure sensor. Look for frays, shorts, or loose connections. If found, repair them.
- 22. Check the fluid level in the power steering reservoir. Ensure it's at the recommended level. If low, top it off with the specified type of fluid and retest.
- 33. With a multimeter, measure the voltage at the power steering pressure sensor connector while turning the steering wheel. Voltage should be between 0.5 and 4.5 volts. If it's above 4.5 volts, go to step 4.
- 44. If the voltage is still above 4.5 volts, replace the power steering pressure sensor. If it's normal, investigate further upstream for wiring issues.
Common causes
- Faulty power steering pressure sensor
- Wiring issues or short circuit in the sensor circuit
- Fluid contamination affecting sensor readings
- Connector problems including corrosion or looseness
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's generally safe, but you may experience steering difficulty. Fix it soon to avoid potential steering problems.
Will the code come back after clearing it?
If the underlying issue is not fixed, yes, it will likely return.
Why do I get this code along with SPN 1259?
SPN 1259 also relates to the power steering pressure sensor, indicating a potential sensor fault, which often appears alongside SPN 6259.
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