Other CausesĬonclusion: P2272 is Usually Caused by a Bad O2 Sensor If it’s stuck at 0, that would indicate that the sensor itself is bad. It should fluctuate as you press the gas. You can also check the voltage at the oxygen sensor if you have a good scan tool. Or if you have dual exhaust, check it vs the other downstream O2 sensor.
Check the resistance compared to the factory specs. This will cause the vehicle to fail emission testing. This is due to a defective sensor or an exhaust leak in front of the sensor in most cases.
You can check your F250’s wiring harness with a multimeter set to OHMS. Code P2272 is a code indicating the O2 sensor post catalyst on bank 2 is staying lean all the time. The O2 sensor wiring harnesses (due to their proximity to the exhaust system) have some of the roughest lives of any automotive wiring.
Take a look at the wiring going to it and see if it looks cracked or corroded. If there isn’t an exhaust leak, the most likely cause of P2272 is a bad O2 sensor.
Oxygen Sensor (Highly Likely) Your O2 sensor will be under the car after the catalytic converter. If an exhaust leak is big enough to cause P2272, it’s probably going to be big enough to make some noticeable noise. Exhaust Leak (Highly Likely)Īn exhaust leak is one of the more common reasons why P2272 is thrown. Here are some of the more common causes of P2272. There are usually no drivability issues when P2272 appears by itself. The signal from the oxygen sensor upstream of the catalytic converter does not agree with the lean condition indicated by the downstream oxygen sensor. It is indicating that the signal coming from the oxygen sensor at B2S2 is leaner than it should be. There are almost never any symptoms associated with P2272. On some vehicles, there may be a second sensor (B2S3) after the catalytic converter, but if that were causing the problem, you’d be dealing with P2276.
Here’s what P2272 means, and how to find Bank 2 Sensor 2. Pulling trouble codes requires the use of an OBD II capable code reader or scan tool, with the scan tool being preferable because it gives more diagnostic information than a code reader does. This lets it read the exhaust before and after it runs through each converter to make sure that it is removing pollutants. The Ford Escape uses an OBD II diagnostic port located under the left side of the dash near the steering column. There are oxygen sensors on both sides of your F250’s catalytic converter(s). P2272 is typically caused by a bad oxygen sensor, or an exhaust leak. This does not necessarily mean that the vehicle is running lean (although it can, but usually doesn’t). It means that the “bank 2” downstream oxygen sensor (behind the catalytic converter) is continuously sending voltage that indicates a lean air/fuel mixture.
If you are unsure about what your diagnostic trouble codes mean have your Mustang diagnosed by a professional automotive technician.P2272 in the Ford F250 is a general diagnostic trouble code. Flashing Check Engine Light: If your check engine light is flashing, stop driving your Mustang and have it towed to your nearest mechanic - you probably have a very serious problem with your car and you risk ruining your engine by driving it. Steady Check Engine Light: If your check engine light is on every time you operate your Mustang, you need to have it checked as soon as possible, especially if you notice performance problems or unusual noises. For example, does it happen when you accelerating, driving on the highway or does it appear at low speeds? This will help your mechanic evaluate the issue. Intermittent Check Engine Light: If the check engine light on your 1997 Mustang is intermittent, try to take note of the conditions when this happens. The video above shows how to locate the on board diagnostics (OBD) plug on your 1997 Mustang, how to read the trouble codes and how to reset or clear the check engine light using a scanner on your Mustang. In some cases you need to pull over immediately to prevent damage while in others you merely need to tighten you gas cap next time you stop in order to reset the service engine soon light. A check engine light can indicate a broad spectrum of problems with your 1997 Ford Mustang.