P0551 — Power Steering Pressure Sensor Circuit Malfunction
Drive with caution — fix soon.
What P0551 means
This code means the computer has detected a general fault in the power steering pressure sensor circuit. The sensor tells the engine when steering effort is high so it can raise idle and prevent stalling, and a malfunction usually comes from the sensor, its wiring, or connector. Most repairs involve replacing the sensor or fixing a wiring or connector problem.
Common symptoms
- Check engine light is on
- Idle drops or surges when turning the wheel
- Engine nearly stalls during parking maneuvers
- Rough idle at low speeds
- Steering effort feels normal but idle behaves oddly
Common causes
- Faulty power steering pressure sensor
- Damaged or corroded sensor wiring
- Loose or dirty electrical connector
- Open or shorted circuit to the sensor
- Low or contaminated power steering fluid affecting readings
Typical repair cost
$130 – $350
Varies by vehicle and root cause.
Frequently asked questions
Can I keep driving with a P0551 code?
Usually yes. Your steering still works mechanically, so it's safe to drive short term. The main issue is that the engine may idle roughly or nearly stall when you turn at low speed. Have it checked soon to avoid stalling in traffic or while parking.
How much does it cost to fix a P0551 code?
Most repairs fall between $130 and $350. Replacing the pressure sensor is the typical fix, while wiring or connector repairs can vary the cost. A diagnosis confirms whether it's the sensor or the circuit before you buy parts.
Is a P0551 code serious?
It's moderate. It doesn't disable your steering, but it can cause stalling and rough idle that's annoying and occasionally inconvenient in traffic. Fixing it restores smooth idle when turning.
Does a P0551 code affect my steering?
Not the steering itself. The power steering pump and assist still work normally; this sensor only reports pressure to the engine for idle control. So you'll feel the effect as idle or stalling issues, not as heavy or lost steering.