Blog

Fault code P0471 means exhaust pressure sensor signal out of specification. The sensor monitoring exhaust gas pressure (typically for the DPF) provides an implausible value.

Typical symptoms

• Engine light on
• Regenerations not started or continuous
• Loss of power

Most common causes

• Sensor pipes blocked by soot or cracked
• Failed sensor
• Oxidised connector
• Particulate filter actually clogged

How it is checked in diagnosis

• Comparing measured and expected pressure
• Cleaning or replacing the connecting pipes
• Checking the actual filter load

Can you drive with code P0471?

Yes, for short stretches, but the regenerations may not work correctly.

How MasterTuning helps

We read the real values from the ECU, not just the code: that is the difference between identifying the component responsible and replacing parts by trial and error. After the repair we clear the fault and check that it does not come back. Centres throughout Italy.

Read more: vehicle database · find an installer · what is ECU remapping

Do you have code P0471 on your car? Book a diagnosis at your nearest MasterTuning centre.

Frequently asked questions

What does fault code P0471 mean?

Code P0471 means exhaust pressure sensor signal out of specification. The sensor monitoring exhaust gas pressure (typically for the DPF) provides an implausible value.

Can you drive with fault P0471?

Yes, for short stretches, but the regenerations may not work correctly.

Is clearing code P0471 enough to fix it?

No: if the cause is still present the code comes back after a few kilometres. Clearing should only be done after the repair, with the diagnostic tool.

How much does it cost to fix code P0471?

It depends on the component responsible: the diagnosis is precisely what identifies it with real measurements, avoiding unnecessary replacements that cost far more than the correct repair.