P2272 OBD-II Trouble Code: O2 Sensor Signal Stuck Lean Bank 2 Sensor 2

Our certified mechanics come to you · 12-month, 12,000-mile warranty

SCHEDULE P2272 DIAGNOSTIC Get a fair and transparent estimate upfront
Red-stars EXCELLENT RATING ON

Cost of diagnosing the P2272 code

P2272 is a diagnostic trouble code (DTC) for "O2 Sensor Signal Stuck Lean Bank 2 Sensor 2". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $70.00. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $30.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford$70.00$30.00
Toyota$70.00$30.00
BMW$70.00$30.00
SCHEDULE P2272 DIAGNOSTIC Get a fair and transparent estimate upfront

Check Engine Light

What the P2272 code means?

P2272 is an OBD-II generic code for the engine control module (ECM) detecting the O2 sensor for bank 2 sensor 2 after the catalytic convertor is stuck lean.

What causes the P2272 code?

  • The O2 sensor for bank 2 sensor 2 is stuck in the lean voltage output when tested and stayed lean for a certain amount of time during ECM testing.

  • The wiring or connector for the O2 sensor has corrosion in the connections causing excessive resistance.

  • The exhaust has a leak in front of the O2 sensor.

  • Possible shorted or crossed wires.

What are the symptoms of the P2272 code?

  • The Check Engine light will be illuminated and the code is set in ECM memory as a fault.

  • The ECM will turn off the Check Engine light if three drive cycles pass without another failure.

  • The ECM may go into failure mode open loop fuel control on most manufacturer vehicles.

  • The engine may have run lean to prevent catalyst damage.

How does a mechanic diagnose the P2272 code?

  • Scans for codes and documents the code in the ECM and looks at the freeze frame data for failure.

  • Checks the O2 sensor for damage to the sensor or wiring connections.

  • Checks the exhaust for any leaks before the sensor.

  • Tests the O2 sensor output when the engine is richened using propane.

  • Removes O2 sensor and inspects for damage to sensing element from a damaged catalyst.

Common mistakes when diagnosing the P2272 code?

  • Clearing ECM memory codes before checking the freeze frame data for the main failure problem, so the failure may be duplicated and repaired

  • Failing to verify the failure before replacing the O2 sensor

  • Not repairing any exhaust leaks in front of the sensor

How serious is the P2272 code?

Code P2272 is a code indicating the O2 sensor post catalyst on bank 2 is staying lean all the time. This is due to a defective sensor or an exhaust leak in front of the sensor in most cases. This will cause the vehicle to fail emission testing.

What repairs can fix the P2272 code?

Additional comments for consideration regarding the P2272 code

Code P2272 is caused most commonly from an internal failure of the circuit inside the O2 sensor. The other most common failure is from the exhaust flange leaking in front of the sensor. This introducing excessive amounts of oxygen into the exhaust and will cause the sensor to stay mostly lean all the time.

Need help with a P2272 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

trouble codes
Check Engine Light
P2272

Fast and easy Check Engine Light is on Inspection service at your home or office.

SCHEDULE P2272 DIAGNOSTIC
Get a fair and transparent estimate upfront

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.5/5

Number of Reviews

3,636

Rating Summary
3,315
161
42
24
94
3,315
161
42
24
94

Eduardo

16 years of experience
203 reviews
Eduardo
16 years of experience
Very helpful and friendly. Did everything we asked for and more.
2003 FORD TAURUS - CHECK ENGINE LIGHT IS ON - PASADENA, TEXAS

Rafael

12 years of experience
9 reviews
Rafael
12 years of experience
Very good experience. Trouble shot a check engine light very thoroughly. Very good customer service. Overall solid experience and would highly recommend him and the service to others.
2007 GMC YUKON XL 1500 - CHECK ENGINE LIGHT IS ON - AVONDALE, ARIZONA

Michael

13 years of experience
379 reviews
Michael
13 years of experience
Very efficient ..
2005 CHEVROLET IMPALA - CHECK ENGINE LIGHT IS ON - ROSWELL, GEORGIA

Robert

29 years of experience
179 reviews
Robert
29 years of experience
Robert is the best mechanic I have encountered in 50 years. He is honest and efficient. Anyone would do well to trust Robert with his or her auto!
2004 FORD ESCAPE - CHECK ENGINE LIGHT IS ON - SAN JOSE, CALIFORNIA

More related articles

Insurance Requirements for Car Registration in Kentucky
The Kentucky Transportation Cabinet requires that all drivers in Kentucky carry liability automotive insurance, or “financial responsibility” in order to operate a vehicle legally and maintain vehicle...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How to Get a Louisiana Driver's Permit
s licensing program. The first step in this program is to obtain...

Related questions

Q: Ecu problem wanting to make sure

You need to have some of the codes like the first three diagnosed using the proper pinpoint tests until a problem is found. You may have an electrical harness short or a cut that is causing all the codes. Only...

Q: ETC - 2008 Dodge Charger

Hello. The ETC code can come on for many reasons, but essentially the engine idle speed control is often times the problem. The fact that it indicated the spark plugs needed to be changed suggests there was a misfire of...

Q: P1510 trouble code is showing up. Cleaned the idle control valve but it won't start.

The idle air control valve monitors the air intake as it is mixed with fuel prior to being injected into the engine. This valve is controlled by the vehicle's computer which will adjust idle speed based upon other measurements such...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1-800-701-6230 · hi@yourmechanic.com