P0471 Exhaust pressure sensor reads wrong

By: Diagno editorial team · Updated: 2026-10-15

P0471 means: Exhaust pressure sensor reads wrong. The pressure sensor measures how clogged the particulate filter is. Drive gently and have the car checked soon. The repair usually costs about €60–250 in Estonia. The most common cause: sensor hose is loose, split or blocked. Other possible causes: sensor has failed, connector or wire.

What it means

The pressure sensor measures how clogged the particulate filter is. If the sensor gives false readings, the engine computer doesn't know when to burn off the filter.

What could be wrong

1. 1Sensor hose is loose, split or blocked
2. 2Sensor has failed
3. 3Connector or wire

What you can check yourself

Check the sensor's two hoses. They often crack from the heat. You can do the simpler checks yourself.

How we fix it

1. We compare the sensor reading
2. We replace the hoses
3. We replace the sensor

Standard SAE description: Exhaust Pressure Sensor Range/Performance