P2270, P2272 Ford? (Perfect answer)

  • Ford has issued a service bulletin to address trouble codes P2270, P2272 on 2010-2011 Ranger, 2010-2012 Navigator and 2010-2012 E-Series, Expedition, F-150, F-Super Duty vehicles. The bulletin applies to these vehicles with these engine combinations: 2010 F-150 vehicles a 4.6L or 5.4L engine

How do I fix error code P2272?

What repairs can fix the P2272 code?

  1. Replace the O2 sensor due to a deteriorated sensor output.
  2. Repair the wiring connector or wiring to the O2 sensor of corrosion.
  3. Repair the exhaust leak in front of the sensor.

How do I fix error code P2270?

What repairs can fix the P2270 code?

  1. Replacing the O2 sensor.
  2. Repairing the wiring or connection to the O2 sensor assembly.
  3. Replacing the ECM because of an open circuit.

What is Engine code P2270?

Diagnostic Trouble Code (DTC) P2270 stands for “ O2 Sensor Signal Biased/Stuck Lean (Bank 1, Sensor 2).” It warns that the #2 oxygen sensor on bank 1 continually sends the voltage signal for a lean air mixture instead of the proper air to fuel ratio calculated by the power control module or PCM.

What is code P2272 mean?

OBD-II Code P2272 is defined as a O2 Sensor Signal Biased/Stuck Lean. The oxygen sensor measures the amount of oxygen in the exhaust between the engine and the catalytic converter. This sensor is supposed to fluctuate a minimum of 10 times per second within a specified voltage.

What O2 sensor is bank 2 sensor 2?

Diagnostic Trouble Code (DTC) P0158 stands for O2 Sensor Circuit High Voltage (Bank 2, Sensor 2). The O2 sensor 2 is the downstream O2 sensor and it measures the amount of oxygen in the exhaust gases leaving the catalytic converter (cat).

What does po430 mean?

Code P0430 indicates that the catalytic converter is not functioning efficiently, therefore increasing the output of harmful pollutants by the vehicle.

How do I fix code P0137?

What repairs can fix the P0137 code?

  1. Replacing the O2 sensor for bank 1 sensor 2.
  2. Repairing or replacing the wiring or connection to the O2 sensor for bank 1 sensor 2.
  3. Repairing exhaust leaks before the sensor.

Should I replace all O2 sensors at once?

Manufacturers recommend replacing O2 sensors in pairs (both Upstream or both Downstream). An older, slower sensor can cause an imbalance in the engine management system, leading to poor fuel economy and possible damage to the catalytic converter.

Is Bank 1 upstream or downstream?

Bank 1 Sensor 1 means Upstream Right/Rear;Bank 2 Sensor 1 means Upstream Left/Front;Bank 1 Sensor 2 means Downstream Right/Rear;Bank 2 Sensor 2 means Downstream Left/Front.

What causes code P2096?

What causes the P2096 code? While several conditions can cause the P2096 trouble code to register, a common cause is an leak in one of the hoses/lines, which introduces extra air into the system. A cracked exhaust manifold or damaged gaskets or o-rings can also introduce too much oxygen.

Which side is bank 2 sensor 2?

Bank 2 Sensor 2 is the second sensor on the engine’s exhaust pipe, usually behind the catalytic converter. On Bank 2 means it is at the engine side with cylinders 2, 4, 6, 8, etc.

How is po420 code diagnosis?

How to Diagnose Code P0420:

  1. Scan your vehicle to verify P0420 is the only code present.
  2. Examine the exhaust system for damage and leaks.
  3. With the vehicle running and at normal operating temperature, use the digital multimeter to check the voltage reading of the downstream O2 sensor.

How do I fix code P2A04?

Replace/Repair These Parts To Fix OBD Code P2A04 Replace the faulty oxygen sensor by getting a new one from PartsAvatar. Engine Control Module – Does your car jump start on reverse polarity? It is an indication of damaged ECM. Repair / replace it soon to avoid P2A04 error.

P2272 Oxygen Sensor Signal Stuck Lean Bank 2 Sensor 2

Lean Bank 2 Sensor 2 has a stuck O2 sensor signal.

What does that mean?

This is a general powertrain code, which means it applies to all makes and models from 1996 and onward. The particular troubleshooting steps, on the other hand, will differ from car to vehicle. This P2272 fault code pertains to the O2 (oxygen) sensor on bank 1 of the post-catalytic converter (sensor2) on the vehicle. This post-cat sensor is intended to check the performance of the catalytic converter after it has completed its job. The converter’s duty is to minimize the amount of emissions that exit the exhaust pipe.

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This DTC relates to a downstream sensor (i.e., after the catalytic converter), specifically sensor2 on bank2.

P2276 indicates that there is a third sensor downstream, and if this is the case, the problem has been identified.

Note: Some manufacturers, such as Ford, may refer to this as a Catalyst Monitor Sensor, which is the same thing as a Catalyst Monitor Sensor but has a different name.

If you have several DTC codes, make sure to repair them in the sequence in which they appear on the screen.


Because this is not sensor1, it is unlikely that you will see any drivability problems. You will observe the illumination of the Malfunction Indicator Lamp (MIL). In some instances, the engine, on the other hand, may run rough.

Potential Causes

The following are possible reasons of this DTC:

  • Exhaust leak in the vicinity of the oxygen sensor HO2S2 (Sensor 2) that is contaminated or has failed
  • HO2S2 wiring/circuitry that is not working properly
  • Installation of HO2S2 with carelessness
  • Deficiency in fuel pressure
  • A faulty fuel injector
  • An engine coolant leak
  • A faulty purge solenoid valve
  • A faulty PCM

Diagnostic and Repair Procedures

Look for corrosion, rubbed, chafed, or bent wires, wiring pins that are bent or loose, burned look, and/or crossed wires while visually inspecting the wiring and connections. Depending on the situation, repair or replace. Visually inspecting the wiring for all of the sensors would be a good idea at this point. Check for exhaust leaks and make any required repairs. Check the resistance of the harness connector(s) with a digital volt ohm meter (DVOM) set to ohms and a digital multimeter (DMM).

  • If necessary, replace or repair the item.
  • Keep an eye on the bank 2 and sensor 2 readings.
  • When the engine is revved, the voltage of the sensor should fluctuate as well (react).
  • If you decide to replace the oxygen sensor, be sure to get an OEM (original equipment manufacturer) sensor for the best results.
  • Other suggestions for troubleshooting include: Using a fuel pressure tester, check the fuel pressure at the Schrader valve on the fuel rail to ensure it is correct.
  • Examine the solenoid valve that controls the purge.
  • Check for coolant leaks in the coolant channels.

In the case of this issue code, there may be technical service bulletins (TSBs) that relate to your vehicle’s make and model. Check with your dealership’s service department or an internet source to see if there are any specific TSBs that apply to your particular vehicle.

Diagnostic Video

Here is a video that demonstrates how to test the O2 sensor circuit on a Ford. A 2005 Mercury Sable with the P2270code (same DTC, but for bank 1 rather than for bank 2) is used in this example; the technique would be identical for other makes and models. We have no affiliation with the creator of the following video:

Related DTC Discussions

  • An O2 sensor circuit test for a Ford is demonstrated in the following video. A 2005 Mercury Sable with the P2270code (same DTC, but for bank 1 instead of 2) is used in this example
  • The technique would be identical for other makes and models. It should be noted that we have no affiliation with the video’s creator:

Need more help with a p2272 code?

If you still need assistance with the P2272 error code, please ask your issue in one of our FREE vehicle repair discussion boards. Please keep in mind that this material is being provided solely for informational reasons. It is not meant to be used as repair advice, and we are not liable for any actions you take in relation to any vehicle. All of the information on this website is protected by intellectual property rights.

Diagnostic Trouble Code (DTC) P2270 or P2272 – 2010-2012 Ford & Lincoln

FORD: 2010-2011Ranger2010-2012E-Series,Expedition,F-150,F-Super Duty
LINCOLN: 2010-2012Navigator

This article replaces TSB12-7-9 in order to bring the production fix date and Issue Statement up to date.

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In order to update the production fix date and Issue Statement, this article replaces TSB12-7-9.


To rectify the situation, follow the procedures outlined in the Service Procedure.


  1. To recover all continuous memory DTCs, use theFordIntegrated Diagnostic System(IDS)scan toolor similar to scan the vehicle (CMDTC). Whether or not DTC P2270 or P2272 are present
  1. No, this article does not apply in this situation. For normal diagnosis, refer to the Powertrain Control/Emission Diagnosis (PC/ED) handbook.
  1. Replace only the catalyst monitor sensors that have been identified as having been damaged by the DTC detected P2270 – Bank 1 or P2272 – Bank 2. Refer to Section 303-14 of the Workshop Manual (WSM).
F85Z-9G444-BA Catalyst Monitor Sensor(2010-2011Expedition / Navigator / E-Series /2011 F-SuperDuty 6.2L/ 2010-2012F-Super Duty5.4L/6.8L – LH/RH)
F85Z-9G444-F Catalyst Monitor Sensor(2010F-1504.6L 2V, 4.6L 3V, 5.4L – RH/LH Bank for 4X2 and Electric Transfer Case 4×4 And RH Only Manual Transfer Case 4×4) / 2010-2011Ranger4.0L R
F85Z-9G444-E Catalyst Monitor Sensor(2010-2011Ranger2.3L – LH/RH / 2010-2011Ranger4.0L LH)
BL3Z-9G444-A Catalyst Monitor Sensor- 2011-2012 F150 5.0L (RH/LH)
BL3Z-9G444-B Catalyst Monitor Sensor(2012Expedition / Navigator /F-SuperDuty 6.2L – LH/RH)
9L3Z-9G444-B Catalyst Monitor Sensor(2010 F150 4.6L 2V, 4.6L 3V, 5.4L LH Only – Manual Transfer Case 4×4)
140084A 2010-2011Ranger2.3L: Check DTCs, Replace One (1)Catalyst Monitor Sensor(Do Not Use With Any Other Labor Operations) 0.4 Hr.
140084A 2010-2012Expedition,Navigator, 2010F-150, 2011-2012 F150 5.0L, 2010-2012Ranger4.0L, 2011-2012F-Super Duty5.4L, 6.2L, 6.8L: Check DTCs, Replace One (1)Catalyst Monitor Sensor(Do Not Use With Any Other Labor Operations) 0.5 Hr.
140084A 2010-2012Econoline4.6L, 5.4L, 6.8L: Check DTCs, Replace One (1)Catalyst Monitor Sensor(Do Not Use With Any Other Labor Operations) 0.6 Hr.


Those who qualify under the terms of the New Vehicle Limited Warranty Coverage as well as the Emissions Warranty Coverage A TSB has no effect on the warranty/ESP coverage limitations, policies, or earlier approvals that have been established. The warranty/ESP coverage limitations are derived by the identified causative component and confirmed using theOASISpart coverage tool, which is available for download here.


14-0084 Disclaimer Regarding Pricing DISCLAIMER ON PRICE DISCLAIMER ON PRICE

Ford Mustang P2272: B2S2 O2 Sensor – Stuck Lean

P2272 is a generic diagnostic fault code that appears in the Ford Mustang. Essentially, it implies that the “bank 2” downstream oxygen sensor (located behind the catalytic converter) is continually transmitting voltage, indicating that the air/fuel combination is too rich. This does not necessarily imply that the vehicle is operating at a lean angle (although it can, although it most often does not). In most cases, the error code P2272 is triggered by a faulty oxygen sensor or an exhaust leak.

Bank 2 Sensor 2 Location

Oxygen sensors are located on both sides of the catalytic converter in your Mustang’s engine (s). This enables it to read the exhaust before and after it passes through each converter, ensuring that contaminants are removed from the exhaust. Here’s what P2272 implies and where to look for it. Bank 2 Sensor 2 is located in the second bank of sensors. (Bank 2|Sensor 2): O2 Sensor Signal is Biased/Stuck Lean (P2272).

  • It is the side of your Mustang’s engine with the second cylinder that is known as Bank 2. It is not need to be concerned if it has a four-cylinder engine because there is only one cylinder head. If your engine has more than one cylinder head (as is the case here), you will need to seek up where cylinder one is located for your particular engine before proceeding. P2270, on the other hand, has an effect on bank 1. Sensing unit 2 is referred to as “downstream” of the catalytic converter, which refers to the sensor that is located after the catalytic converter. On some cars, a second sensor (B2S3) may be installed after the catalytic converter
  • However, if this sensor were to be the source of the problem, you would be dealing with P2276.

P2272 Symptoms:Ford Mustang

When it comes to P2272, there are practically never any symptoms present. B2S2 is reporting a lower-than-expected oxygen sensor signal, which indicates a problem with the sensor’s operation. The signal from the oxygen sensor upstream of the catalytic converter does not match with the signal from the downstream oxygen sensor, indicating that the engine is running lean. If it did, you’d have the error code P0171. When P2272 arises on its own, there are typically no drivability concerns to worry about.

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P2272 Causes:Ford Mustang

P2272 can be caused by a variety of factors, some of which are listed below.

Exhaust Leak (Highly Likely)

P2272 can be caused by a number of different factors.

Oxygen Sensor (Highly Likely)

Your oxygen sensor will be located below the automobile, following the catalytic converter. If there isn’t an exhaust leak, the most likely reason of the P2272 code is a malfunctioning oxygen sensor (O2 sensor). Take a look at the wire that leads to it to determine whether it appears to be broken or otherwise deteriorated. Because of their close proximity to the exhaust system, the O2 sensor wiring harnesses have one of the toughest lifetimes of any automobile wiring, if not the toughest. You may examine the wire harness on your Mustang with a multimeter set to the OHMS voltage.

Alternatively, if you have dual exhaust, compare the reading to the reading from the second downstream O2 sensor.

When you push the gas pedal, it should vary.

Other Causes

  • Low fuel pressure
  • A faulty oxygen sensor
  • A faulty fuel injector on bank 2
  • A faulty purge valve
  • A faulty PCM

Conclusion:P2272 is Usually Caused by a Bad O2 Sensor

When the code P2272 shows, it is usually the oxygen sensor that has to be changed. However, there may be other concerns to consider. Wishing you the best of success in repairing your Mustang!

P2272 – “O2 sensor stuck lean – bank 2 sensor 2”

Hello, I recently purchased a 2004 Lariat with the 5.4L V8. They stated that they were able to bring it in with the CEL turned on, and I assume they were receiving DTC P2272, which is the same code I am now receiving. So they informed me that they had replaced the bank 2 sensor after the cat sensor. I was able to confirm that they did because the sensor seemed to be fresh new. The CEL illuminates as soon as the truck is driven out the parking lot. P2272 is a diagnostic trouble code. As soon as I clear the code, the light comes back on.

  • There are no exhaust leaks.
  • The truck, on the other hand, is in excellent condition.
  • – Following the reading of these two papers, it is possible that I may encounter a similar circumstance in which the sensor is intended for a certain car but does not function.
  • This appears to be an NTK sensor, yet an online search for this part number did not turn up this specific number, but rather related NTK numbers.
  • It appears to be intended for my truck due to the fact that the wiring connection is plainly intended for this truck.

In order to bring the truck in, I’m waiting for a response from the dealership. Due to the fact that they did not understand it the first time, I want to be able to explain to them what the possible difficulties and solutions are. So, has anyone else had this issue or has any suggestions? Thanks.

Code P2270

The following is a description of the catalyst monitoring system taken from the shop manual: Catalyst Efficiency Monitor is an acronym that stands for Catalyst Efficiency Monitor. An oxygen sensor placed before and after the catalyst is used to infer the hydrocarbon (HC) effectiveness of the catalyst based on the oxygen storage capacity of the catalyst, according to the manufacturer. High efficiency catalysts have a substantial amount of oxygen storage capacity under typical, closed-loop fuel conditions.

As the effectiveness of the catalyst degrades as a result of heat and/or chemical degradation, the catalyst’s capacity to store oxygen decreases.

The back sensors switch in the same manner as the front sensors, although they do so more slowly when the cats are in excellent health.

This can be due to a variety of factors, including: Wiring and pins that have been pinched, shorted, and corroded Sensor wires that have crossed each other Leaks in the exhaust system Sensors that are contaminated or damaged, as indicated by the code bb816331.

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