Power Steering Pressure Sensor Circuit Intermittent
The P0554 code indicates an intermittent signal from the power steering pressure (PSP) sensor circuit. The PSP sensor monitors hydraulic pressure in the power steering system and sends a voltage signal to the PCM. An intermittent fault means the signal is erratic or drops out temporarily, often due to wiring issues, loose connections, or a failing sensor. This can affect idle speed control and steering assist.
01. Most Common Causes
- Faulty power steering pressure sensor
- Damaged or corroded wiring/connectors in the PSP circuit
- Loose electrical connection at the sensor or PCM
- Intermittent short or open in the circuit
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Hard steering or intermittent loss of power steering assist
- Erratic idle speed when turning the steering wheel
- Stalling or rough idle during parking maneuvers
03. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data to capture conditions when the fault occurred.
Step 2: Visually inspect the PSP sensor connector and wiring for damage, corrosion, or loose pins.
Step 3: Use a multimeter to check sensor signal voltage (typically 0.5-4.5V) while turning the steering wheel; look for dropouts.
Step 4: Check for continuity and shorts in the circuit between the sensor and PCM.
Step 5: If wiring is good, replace the PSP sensor and clear the code.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended. An intermittent loss of power steering assist can cause sudden hard steering, increasing the risk of an accident. Have it diagnosed promptly.
How much does it cost to fix?▼
Typically $50-$150 for a DIY sensor replacement. Professional repair including diagnosis and labor may range from $150-$300.