Skip the auto shop - Our mechanics make house calls

P2573 OBD-II Trouble Code: Direct Ozone Reduction Catalyst Sensor Circuit Range/Performance

Check Engine Light

P2573 code definition

The P2573 Trouble Code refers to the detection of voltage in the direct ozone reduction catalyst deterioration sensor circuit that is out of the manufacturer’s normal operating range.

What the P2573 code means

The powertrain control module utilizes the data from the oxygen sensors to determine the degree of ozone reduction catalyst deterioration for each of the converters. If the sensors do not detect the proper degree of deterioration, the P2573 code will be stored and the Check Engine Light could come on as well.

What causes the P2573 code?

The following are the most common causes of the P2573 code:

  • Faulty direct ozone reduction catalyst deterioration sensor
  • Bad oxygen sensors - if this is the case though, there will usually be an oxygen sensor code in addition to the P2573 code
  • Some of the contributing factors for this code include using the wrong fuel, a faulty coolant temperature sensor, or issues with the exhaust manifold

What are the symptoms of the P2573 code?

As is the case with many trouble codes, the extent of the symptoms you might experience can vary greatly. For some drivers, the only issues will be the stored code and perhaps the Check Engine Light being illuminated. However, in many cases, there will also be issues with the drivability of the vehicle. The engine might chug and hesitate, and you could hear hissing sounds while you are trying to accelerate. In some cases, the engine might stall, or it might not start at all.

How does a mechanic diagnose the P2573 code?

When the mechanic diagnoses the code, they will start by hooking up their OBD-II scanner to your vehicle. The vehicle has an onboard computer that stores the codes and data about the car or truck. The scanner can access this data and provide the technician with valuable information when it comes to diagnosing and repairing the vehicle. They also want to reset the vehicle and drive it to see if the code returns. This lets them know if the code was triggered by mistake or not.

Common mistakes when diagnosing the P2573 code

The biggest problem with misdiagnosis for the P2573 code is not doing a full investigation into the issue that led to the direct ozone reduction catalyst failure. They make the wrong repairs because they do not dig deep enough to find the real cause for the problem with the vehicle.

How serious is the P2573 code?

The symptoms can vary quite a bit. In some cases, the driver might not know that the car has an issue until they bring it in for a checkup. However, there can be some serious issues with the vehicle as well, and it might be difficult to drive it. The car could stall, and it will not have the power that it should have. Never put off getting your vehicle checked out. Take it to a mechanic so they can deal with the P2573 code and any other issues the vehicle might have.

What repairs can fix the P2573 code?

The following are some repairs mechanics can use for the P2573 code:

Additional comments for consideration regarding the P2573 code

Technicians report that they will often see repeated failures of the direct ozone reduction catalyst when there are other codes present in the vehicle and they are left unattended. This is why it is so important for drivers to take good care of their car or truck and to get the repairs they need as soon as they present themselves. If you wait too long and a number of codes are stored up, it will mean greater problems with the vehicle and more repairs for the vehicle. Take the time to find a qualified mechanic who can diagnose and repair your vehicle.

Need help with a P2573 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.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

Post a question and get free advice from our certified mechanics.

ASK A QUESTION

More related articles

P0121 OBD-II Trouble Code: TPS "A" Circuit Range Performance Problem
P0121 code definition Throttle Pedal Position Sensor/Switch (TPS) A Circuit Range Performance Problem What the P0121 code means P0121 is a generic OBD-II code which indicates that the Engine Control...
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...


Related questions

Q: wont go faster 35mph

If the Check Engine Light is on this would be helpful as the codes that would be triggered by this would generate useful information relating to the problem. Without the benefit of hooking the car up to a scanner and...

Q: Engine light on, black smoke coming out exhaust on acceleration and fault codes

The glow plug faults are most likely going to cause a hard start condition, which will be most noticeable when the engine is cold. The colder the engine, the more difficult it would be to start usually. Often times, glow...

Q: P0442

As you may already know, this may be related to a faulty or leaking gas cap, however this can also be related to several other factors such as the following: A non-conforming gas cap (i.e. not factory/original brand) A...