P0474 Fault Code

Exhaust Pressure Sensor Intermittent

• What does that mean?
• Symptoms
• Causes
• Solutions

The P0474 code indicates an intermittent issue with the exhaust pressure sensor. This sensor monitors the pressure in the exhaust system, ensuring proper operation and efficiency. If it detects irregular pressure readings, it can trigger the check engine light. Understanding this code is essential for diagnosing issues related to the exhaust system.

What are the symptoms of the P0474 code?

Symptoms associated with a P0474 code may include:

• The check engine light illuminated on the dashboard.
• Decreased engine performance, possibly due to improper exhaust flow.
• Increased fuel consumption as the engine might not operate efficiently.
• Potential engine stalling or hesitation during acceleration.

What causes the P0474 code?

Common causes for the P0474 code include:

• A faulty exhaust pressure sensor that is providing inconsistent readings.
• Damaged or corroded wiring or connectors that affect the sensor's performance.
• Blockages in the exhaust system, which can result in fluctuating pressure levels.
• Exhaust leaks, which can also disrupt normal pressure readings.

How to fix P0474?

To resolve the P0474 fault code, follow these steps:

• Begin with a thorough inspection of the exhaust pressure sensor and its wiring for any damage or corrosion.
• Test and, if necessary, replace the faulty exhaust pressure sensor.
• Check for any exhaust blockages or leaks that could be affecting the system.
• Clear the code from the ECU and test drive the vehicle to ensure the issue is resolved.