P0471 on HYUNDAI SONATA — Exhaust Pressure Sensor A Circuit Range/Performance

Q: "What does P0471 mean on a HYUNDAI SONATA?"

"P0471 indicates: Exhaust Pressure Sensor A Circuit Range/Performance. This is a emission controls code. 2 HYUNDAI SONATA owners have reported this to NHTSA."

Q: "What are the most common causes of P0471 on HYUNDAI SONATA?"

"Based on 2 NHTSA reports, the most commonly cited components are: Power Train,Engine, Seat Belts,Unknown Or Other. These percentages are based on the component field in owner complaints."

Q: "Is P0471 serious on my HYUNDAI SONATA?"

"Of 2 NHTSA reports for this code on HYUNDAI SONATA, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic."

Q: "What should I do if my HYUNDAI SONATA shows P0471?"

"1) Check for recalls on your VIN at nhtsa.gov/recalls. 2) Get a professional diagnosis — a code alone doesn't identify the exact failed part. 3) Get 2-3 repair estimates to compare."

What P0471 Means on Your HYUNDAI SONATA

P0471 is a diagnostic trouble code indicating: Exhaust Pressure Sensor A Circuit Range/Performance. This code relates to the emission controls system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

2 HYUNDAI SONATA owners have reported this issue to NHTSA across model years 2021. Most reports come from the 2021 model year. The most commonly reported component is Power Train,Engine (50.0% of reports).

Real HYUNDAI SONATA Owner Reports

Source: NHTSA Complaints Database

"P0471 error comes up off and on, this is recall related but the dealership refuses to address it. The seatbelt has to be clicked 2x in order to stick. Happens with driver side."

— 2021 HYUNDAI SONATA owner · SEAT BELTS,UNKNOWN OR OTHER · Filed 10/31/2025

All reports filed by vehicle owners directly with the U.S. Department of Transportation.

📊 Complaint Trend by Model Year

2

'21

Common Causes on HYUNDAI SONATA

Based on NHTSA complaint component analysis for this vehicle.

POWER TRAIN,ENGINE 50%

SEAT BELTS,UNKNOWN or OTHER 50%

What To Do Next

1
Check for recalls on YOUR VIN
Go to nhtsa.gov/recalls and enter your VIN. If your vehicle is covered, repairs are free.
2
Get a proper diagnosis
A code alone doesn't tell you the exact failed part. A diagnostic at a shop ($50–$150) pinpoints the root cause before you spend money on parts.
3
Compare repair quotes
Get 2–3 quotes. Dealer vs. independent shop prices often differ 30–50% for the same repair.

Frequently Asked Questions

What does P0471 mean on a HYUNDAI SONATA? ▾

P0471 indicates: Exhaust Pressure Sensor A Circuit Range/Performance. This is a emission controls code. 2 HYUNDAI SONATA owners have reported this to NHTSA.

What are the most common causes of P0471 on HYUNDAI SONATA? ▾

Based on 2 NHTSA reports, the most commonly cited components are: Power Train,Engine, Seat Belts,Unknown Or Other. These percentages are based on the component field in owner complaints.

Is P0471 serious on my HYUNDAI SONATA? ▾

Of 2 NHTSA reports for this code on HYUNDAI SONATA, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic.

What should I do if my HYUNDAI SONATA shows P0471? ▾

1) Check for recalls on your VIN at nhtsa.gov/recalls. 2) Get a professional diagnosis — a code alone doesn't identify the exact failed part. 3) Get 2-3 repair estimates to compare.

P0471 on Other Vehicles

→ All codes reported on HYUNDAI SONATA