P2431 — AIR System Air Flow/Pressure Sensor Circuit Range/Performance Bank 1

What Does P2431 Mean?

P2431 is a diagnostic trouble code indicating: AIR System Air Flow/Pressure Sensor Circuit Range/Performance Bank 1. This code relates to the powertrain system. It has been reported in NHTSA complaints across 3 different vehicle models.

Symptoms of P2431

⚠️ Check engine light illuminated

Common Causes

🔍 Loose or damaged gas cap
🔍 Sensor or control module malfunction

P2431 Reports by Year

2011

2

2012

1

2015

1

Real Owner Reports

From NHTSA complaint database — actual owner descriptions.

"CODE P1410 SECONDARY AIR INJECTION SYSTEM SWITCHING VALVE STUCK OPEN. THIS IS A COMMON ERROR MANY 2006 AND UP SUBARU IMPREZA WRX OWNERS ARE HAVING. THE EMISSIONS SYSTEM IS PRONE TO FAIL DUE TO CARBON BUILDUP OR MOISTURE AND RUST CONTAMINATING VALVES, LEADING TO REPAIRS COSTING $700 TO $1500. THIS FA"
— Subaru Impreza owner, 04/01/2011

"CODE P1410 SECONDARY AIR INJECTION SYSTEM SWITCHING VALVE STUCK OPEN. THIS IS A COMMON ERROR MANY 2006 AND UP SUBARU IMPREZA WRX OWNERS ARE HAVING. THE EMISSIONS SYSTEM IS PRONE TO FAIL DUE TO CARBON BUILDUP OR MOISTURE AND RUST CONTAMINATING VALVES, LEADING TO REPAIRS COSTING $700 TO $1500. TH"
— Subaru Wrx owner, 01/31/2012

"WHILE DRIVING ON THE HIGHWAY, THE CHECK ENGINE LIGHT CAME ON AND THE CAR BEGAN SLOWING ITSELF DOWN. WHEN I TRIED TO ACCELERATE THE ENGINE REVVED AND THE RPM INDICATOR WENT UP BUT THE CAR WOULD NOT SPEED UP PAST 45 MPH AND THE STEERING WHEEL SHOOK VERY HARD THE REST OF THE WAY. WHEN I TOOK IT FOR D"
— Volkswagen Jetta owner, 05/01/2015

Source: NHTSA Complaints Database

Most Reported Vehicles for P2431

Based on NHTSA owner complaint data.

#	Vehicle	Reports
1	VOLKSWAGEN JETTA
2	SUBARU IMPREZA
3	SUBARU WRX

P2431 Reports by Vehicle

Detailed NHTSA complaint analysis for each vehicle model.

VOLKSWAGEN JETTA

2 NHTSA reports · Peak: 2009, 2010

Frequently Asked Questions

Can I drive with this code?

It depends on the severity. If the vehicle runs normally, short trips are usually OK. If you notice performance issues, drivability problems, or warning lights beyond the check engine light, get it checked soon.

Will this code clear itself?

Some codes clear automatically after the underlying issue is fixed and several drive cycles pass. But the root cause must be addressed first.

How do I find the exact cause?

A code alone doesn't pinpoint the failed part. You need a diagnostic scan ($50-150 at most shops) that reads freeze frame data and live sensor readings to identify the specific component.

Reported Repair Costs for P2431

Based on 8 owner-reported repair costs from NHTSA complaints.

Low End

$150

Typical

$700

High End

$1500

⚠️ These are owner-reported costs, not estimates. Actual costs vary by location, labor rates, and root cause. Source: NHTSA complaints database.

What To Do Next

Possible Fixes

🔧 Have the code scanned with a professional-grade scanner to read freeze frame data
🔧 Check and tighten the gas cap — replace if cracked or damaged ($5-15)
🔧 Test the relevant sensor(s) with a multimeter before replacing
🔧 If DIY repair isn't feasible, get a diagnostic from a trusted mechanic ($50-150)

1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

P2431: AIR System Air Flow/Pressure Sensor Circuit Range/Performance Bank 1