Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer is having trouble reading the power steering pressure sensor, which helps make steering easier.
The power steering pressure sensor monitors the pressure in the power steering system and sends this information to the engine control module (ECM). If the sensor's signal is out of expected range, the ECM triggers the P0551 code.
The P0551 code indicates that the Power Steering Pressure (PSP) sensor or switch is not operating within its expected range. The ECM uses this sensor to adjust engine speed and performance when the steering wheel is turned, especially at low speeds or when the vehicle is stationary.
• Illuminated Check Engine Light
• Increased steering effort
• Erratic engine idle
• Faulty power steering pressure sensor
• Damaged or corroded wiring/connectors
• Faulty ECM
ECM: Engine Control Module
PSP: Power Steering Pressure
• Use an OBD-II scanner to confirm the code.
• Inspect the power steering pressure sensor and wiring for damage.
• Test the sensor's voltage and resistance.
• Replace the power steering pressure sensor.
• Repair or replace damaged wiring/connectors.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Socket set
$100 - $300
Moderate
• Dodge Caravan
• Jeep Grand Cherokee
• Chrysler Town & Country
• Regularly check power steering fluid levels.
• Inspect and maintain steering components.
• Address any steering issues promptly.
Sensor Issue
• If steering feels heavy, have the vehicle checked.
• Do not ignore the Check Engine Light.
• Schedule regular maintenance checks.
Power steering components may be covered under the vehicle's powertrain warranty. Check with your dealership.
The P0551 code has been a common issue in vehicles with electronic power steering systems introduced in the late 1990s and early 2000s.
Moderate – It is safe to drive for short distances, but should be addressed soon to avoid steering problems.
Driving with a malfunctioning power steering system can be dangerous. Ensure repairs are made promptly to maintain vehicle safety.
• Engine running
• Steering wheel turned
The power steering pressure sensor is typically located on the power steering pump or the steering rack.
Q: Can I drive with a P0551 code?
A: Driving is possible but not recommended for long distances as steering may be affected.
Q: How can I reset the P0551 code?
A: After repairs, use an OBD-II scanner to clear the code. If the issue is fixed, it should not return.
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