P0471 Code: Exhaust Pressure Sensor A Circuit Range/Performance
🟠 Moderate severity · drivable
Drivable, but the exhaust pressure reading doesn't match what the computer expects. Get it checked soon.
What P0471 means
The exhaust pressure sensor is working, but its reading doesn't match what the computer expects. The signal may be stuck, drifting, or responding too slowly, which can affect emissions controls.
Symptoms
- Check engine light is on
- Reduced fuel economy
- Possible loss of power
- Possible failed emissions test
Common causes
- most common: Clogged sensor hose or port
- common: Faulty exhaust pressure sensor
- common: Wiring issue or poor ground
- less common: Restricted exhaust, like a clogged muffler or DPF
How to fix it
| Fix | DIY? | Typical cost |
|---|---|---|
| Clean or replace the sensor hose and port | Yes | $5–40 |
| Replace the exhaust pressure sensor | Yes | $50–150 |
| Have the exhaust system checked for restrictions | Mechanic | $100–200 |
Frequently asked questions
Can I drive with a P0471 code?
Yes, but the exhaust pressure reading is off, which can affect fuel economy and emissions controls.
What does P0471 mean?
The exhaust pressure sensor reading doesn't match what the computer expects, often due to a clogged hose, a bad sensor, or a restricted exhaust.
How much does it cost to fix P0471?
$5–40 to clean a clogged hose, $50–150 for a new sensor, or $100–200 to check for exhaust restrictions.
Related codes
P0470
P0470 Code: Exhaust Pressure Sensor A Circuit
P0472P0472 Code: Exhaust Pressure Sensor A Circuit Low
P0473P0473 Code: Exhaust Pressure Sensor A Circuit High
Updated 2026-08. This page is informational and not a substitute for professional diagnosis.