P2273 OBD-II Trouble Code: O2 Sensor Signal Stuck Rich Bank 2 Sensor 2

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

SCHEDULE P2273 DIAGNOSTIC Get a fair and transparent estimate upfront
Red-stars EXCELLENT RATING ON

Cost of diagnosing the P2273 code

P2273 is a diagnostic trouble code (DTC) for "O2 Sensor Signal Stuck Rich 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 P2273 DIAGNOSTIC Get a fair and transparent estimate upfront

Check Engine Light

P2273 code definition

The P2273 diagnostic trouble code is an indication that the Bank 2 Sensor 2 oxygen (O2) sensor signal is stuck on rich.

Related Trouble Codes:

What the P2273 code means

The purpose of the oxygen (O2) sensor is to monitor the amount of oxygen that is present in the exhaust. The air-fuel ratio is very important. Too much fuel will allow carbon monoxide to be emitted into the atmosphere. Too much oxygen will allow hydrocarbons and nitrogen oxides to be emitted into the atmosphere. The oxygen sensor will send information regarding the air-fuel ratio to the powertrain control module through a voltage signal. If the voltage signal indicates that the air-fuel ratio does not fall within the predetermined range that has been set by the manufacturer, the P2273 diagnostic trouble code will be stored by the powertrain control module (PCM) and the Check Engine Light will come on.

What causes the P2273 code?

  • Faulty oxygen (O2) sensor
  • Oxygen (O2) sensor wires that are broken, shorted, frayed, disconnected, or corroded
  • Oxygen (O2) sensor connectors that are disconnected, damaged, or corroded
  • A blown oxygen (O2) sensor fuse
  • Engine vacuum leaks
  • Exhaust leaks
  • Intake manifold leaks
  • Incorrect fuel pressure
  • Faulty powertrain control module (PCM)

What are the symptoms of the P2273 code?

  • Increased fuel consumption
  • Black smoke coming out of tailpipe
  • Lean engine condition
  • Rich engine condition
  • Check Engine Light on

How does a mechanic diagnose the P2273 code?

  • Diagnostic trouble codes should be diagnosed in the order that they appear in the powertrain control module (PCM)

  • Using an OBD-II scanner to collect all trouble codes that have been stored by the powertrain control module (PCM) as well as freeze frame data

  • Inspecting oxygen (O2) sensor wiring for breaks, shorts, frays, disconnections, and corrosion

  • Repairing or replacing oxygen (O2) sensor wiring that is damaged

  • Inspecting oxygen sensor (O2) sensor connectors for loose connections, damage, and corrosion

  • Using the OBD-II scanner to clear all diagnostic trouble codes and completing a test drive to see if the P2273 code comes back.

  • If the P2273 trouble code does come back, use a scanner to observe the voltage signal of the upstream oxygen (O2) sensor located in front of the catalytic converter.

  • This voltage reading should show a constant variation between 100 millivolts and 900 millivolts.

  • Observes the voltage signal of the downstream oxygen (O2) sensor, located behind the catalytic converter.

  • This voltage reading should show a slow variation between 100 millivolts and 200 millivolts.

  • If the oxygen (O2) sensor voltage readings coincide with the above specifications, inspecting the engine vacuum lines for leaks. Repairing engine vacuum leaks as necessary.

  • Using the OBD-II scanner to clear all diagnostic trouble codes and completing a test drive to see if the P2273 code comes back.

  • If the P2273 trouble code does come back, inspecting the exhaust for leaks and repairing the exhaust leaks as necessary.

  • Using the OBD-II scanner to clear all diagnostic trouble codes and completing a test drive to see if the P2273 code comes back.

  • If the P2273 trouble code does come back, inspecting the intake manifold for leaks. Repairing leaks as necessary.

  • The oxygen (O2) sensor may be faulty and need to be replaced if the voltage readings do not coincide with the above specifications.

  • Using the OBD-II scanner to clear all diagnostic trouble codes and completing a test drive to see if the P2273 code comes back.

  • If the P2273 diagnostic trouble code does come back, there is a possibility that the powertrain control module (PCM) is faulty and needs to be repaired and reprogrammed. This is rare.

Common mistakes when diagnosing the P2273 code

Often, the mistake is made of replacing the wrong oxygen (O2) sensor. This particular code refers to the Bank 2 Sensor 2 oxygen (O2) sensor. A common mistake that is made when diagnosing this code is overlooking faulty wiring and/or connectors or neglecting to inspect for vacuum leaks.

How serious is the P2273 code?

A diagnostic trouble code is normally considered serious when it causes drivability issues or a change in performance. The P2273 diagnostic trouble code is not known to cause drivability issues or a change in vehicle performance. For this reason, this trouble code is not considered serious. However, the car will burn more gas and emit more pollutants so it should be addressed as soon as possible.

What repairs can fix the P2273 code?

Additional comments for consideration regarding the P2273 code

One of the most important things to remember is that vacuum leaks have been known to cause the P2273 diagnostic trouble code. Before making a determination that the oxygen (O2) sensor needs to be replaced, inspect the vacuum hoses and connections to make sure they are properly installed and that there are no vacuum leaks. Vacuum leaks are less expensive to fix than oxygen (O2) sensors and depending on the make and model of the vehicle replacing an oxygen (O2) sensor can be costly.

Need help with a P2273 code?

YourMechanic offers certified 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
P2273

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

SCHEDULE P2273 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

3,526

Rating Summary
3,215
155
41
23
92
3,215
155
41
23
92

Ira

33 years of experience
241 reviews
Ira
33 years of experience
EXCELLENT SERVICE! Highly recommended.
2006 KIA SEDONA - CHECK ENGINE LIGHT IS ON - TAMPA, FLORIDA

Luis

9 years of experience
31 reviews
Luis
9 years of experience
Showed up on time and did a great job thank you
2008 DODGE RAM 3500 - CHECK ENGINE LIGHT IS ON - RIO RANCHO, NEW MEXICO

Alexis

27 years of experience
74 reviews
Alexis
27 years of experience
STAYED WITH THE CAR TILL HE FIGURED IT OUT, THE COMPUTER DIDNT HELP HIM HIS KNOWLEDGE FIX THE CAR, VERY RESPECTFUL, RICARDO IS EXACTLY THE SAME BOTH SHOULD WORK TOGETHER ALL THE TIME THANK ITS ALMOST DONE, JUST A THERMOSTAT AND THAT I HOPE DOES IT. AND THE GUYS ON THE PHONE WERE ALSO VERY POLITE AND FOLLOWED UP ON ME TILL I WAS HAPPY WITH JOB.
2007 CHEVROLET TRAILBLAZER - CHECK ENGINE LIGHT IS ON - MIAMI, FLORIDA

Peter

40 years of experience
1059 reviews
Peter
40 years of experience
excellent and honest service
2011 CHEVROLET TRAVERSE - CHECK ENGINE LIGHT IS ON - PHOENIX, ARIZONA

More related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
Veteran and Military Driver Laws and Benefits in Idaho
The state of Idaho offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch in the...
Veteran and Military Driver Laws and Benefits in New Mexico
The state of New Mexico offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch...

Related questions

Q: My mpv gave a code Shift Solenoid Stuck On just replaced solenoid a and b still dont work . wont drive

Return the vehicle to the shop that replaced the shift solenoids and have them check again. Most reputable shops provide a brief warranty on their repairs. If the repair was made by you, double check all the electrical connectors, on...

Q: When driving, my engine sounds like it is missing

You definitely have a misfire. It sounds like the misfire gets worse under load, which is why the Check Engine Light starts blinking. This indicates the catalytic converter is being damaged. A misfire under load is usually caused by a...

Q: rough idle, heavy missing, fault codes P0301 and P0456. lack of power, where do i start to diagnose this?

Hi there. From the description you have provided, for the P0301 rough idle and heavy misfire and P0456 evaporative small leak detected, the problems are unrelated. The P0301 is a #1 cylinder misfire code. It could be, a spark plug...

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