P2240 — O2 Sensor Positive Current Control Circuit/Open Bank 2 Sensor 1

What Does P2240 Mean?

P2240 is a diagnostic trouble code indicating: O2 Sensor Positive Current Control Circuit/Open Bank 2 Sensor 1. This code relates to the powertrain system. It has been reported in NHTSA complaints across 1 different vehicle models.

Symptoms of P2240

⚠️ Vehicle enters limp/reduced power mode

P2240 Reports by Year

2011

1

2014

1

2019

1

Real Owner Reports

From NHTSA complaint database — actual owner descriptions.

"FAILED INSPECTION CODE P2440,2441 TOOK TO TOYOTA DEALER CHECKED P2240 .NEED TO REPLACE AIR PUMP,AIR SWITCH VALVE BANK AND BANK 2.COST $2700 . THIS IS SECOND TIME FAILED. LAST YEAR AIR PUMP FAILED. TOYOTA DEALER ESTIMATED $4000 REPLACE. I DID BUY AIR PUMP ANG REPLACE IT ,COST ME $ 1100. MILEAGE WER"
— Toyota Tundra owner, 03/16/2011

"2012 TUNDRA 4.6 V8 MY TRUCK WILL GO INTO LIMP MODE AND THE 4LO LIGHT FLASHES, CHECK ENGINE, AND TRAC OFF LIGHTS WERE ALL ON. ALMOST COMPLETE LOSE OF POWER WILL HAPPEN. IN TRAFFIC I END UP BLOCKING EVER VEHICLE BEHIND ME, BECAUSE THE TRUCK WILL NOT REACH THE SPEED LIMIT. IF THERE IS A HILL THEN THE "
— Toyota Tundra owner, 07/10/2019

Source: NHTSA Complaints Database

Most Reported Vehicles for P2240

Based on NHTSA owner complaint data.

#	Vehicle	Reports
1	TOYOTA TUNDRA

P2240 Reports by Vehicle

Detailed NHTSA complaint analysis for each vehicle model.

TOYOTA TUNDRA

3 NHTSA reports · Peak: 2007, 2008, 2012

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 P2240

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

Low End

$270

Typical

$1100

High End

$2700

⚠️ 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
🔧 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.

P2240: O2 Sensor Positive Current Control Circuit/Open Bank 2 Sensor 1