P0471 Fault Code

Exhaust Pressure Sensor Range/Performance

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

The P0471 fault code indicates an issue with the exhaust pressure sensor range or performance. This sensor measures the pressure of exhaust gases before they enter the turbocharger. Proper functionality is crucial for vehicle performance and emissions control. When the sensor provides readings outside of the expected range, it can trigger this fault code, leading to potential power losses and increased emissions.

What are the symptoms of the P0471 code?

Common symptoms associated with the P0471 code may include:

• Illuminated check engine light on the dashboard.
• Decreased engine performance or power loss.
• Poor fuel efficiency due to incorrect air-to-fuel ratio.
• Increased emissions leading to potential environmental concerns.

What causes the P0471 code?

There can be multiple causes for the P0471 code including:

• A faulty exhaust pressure sensor that is providing inaccurate readings.
• Damaged wiring or connectors leading to poor electrical signals.
• Blockages in the exhaust system such as clogged catalytic converters.
• Exhaust leaks before the sensor that can affect pressure readings.

How to fix P0471?

To resolve the P0471 fault code, consider the following steps:

• Inspect and test the exhaust pressure sensor for accurate readings and proper function.
• Check wiring and connectors for damage or corrosion.
• Look for blockages in the exhaust system, particularly near the catalytic converter, and replace any failed components.
• Clear the error code and test drive the vehicle to ensure the issue is resolved.