Guide To P2573 OBD Error Code Solutions

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The trouble code P2573 can be elucidated as Direct Ozone Reduction Catalyst Deterioration Sensor Circuit Range/Performance. The direct ozone reduction catalyst deterioration sensor circuit is being monitored by the engine control module. This trouble code would be set by the ECM when the direct ozone reduction catalyst deterioration sensor circuit signal would not be as per the specifications set by the manufacturer. The specifications on the definition, the troubleshooting steps as well as repairs can always vary from one vehicle make to another.

The PCM utilizes the input data which is received from the upstream and downstream oxygen sensors to calculate the desired direct ozone reduction catalyst temperature in each respective converter. If the right temperature would not be detected, then this error code would be stored and there would be an illumination of the service engine soon light. This trouble code is generic, which would mean that it can apply to all the vehicles which are equipped with the OBD-II or the vehicles which are made since 1996 up to the present.

What causes this problem with the Direct Ozone Reduction Catalyst Deterioration Sensor Circuit Range/Performance?

• Malfunctioning direct ozone reduction catalyst deterioration sensor
• Direct ozone reduction catalyst deterioration sensor harness might be unlocked
• Direct ozone reduction catalyst deterioration sensor circuit might have bad electrical connection

1. Oxygen Sensor - Oxygen sensor plays a vital role in anticipating the levels of oxygen measured for the optimal air to fuel ratios for the combustion process and also for the exhaust emissions to keep the emission levels under check. Thus, replace faulty oxygen sensor now!
2. Engine Control Module - Dead cells in batteries can cause a failure in the engine control module. Many times a battery is left in the rig long after a cell has died. This would affect the grounding in the car battery.
3. Powertrain Control Module - If there are some faults in the PCM, then it may throw off the timing and fuel settings of the engine, which can negatively affect the performance. A flawed PCM may cause the vehicle to experience a reduction in fuel efficiency, power as well as acceleration.
4. Exhaust System Parts - You are likely to notice smoke coming out of the system if you don’t change your exhaust system parts right away when they are diagnosed as defective. This is harmful not only for the system but also for the plastic parts located nearby. Parts Avatar is just the right place for you that offers the excellent quality products at the prices you have always been looking for.
5. Electronic Control Unit - Do you know that the poor performance or unexplained drops in fuel economy or efficiency are often associated to onboard car computer problems, or defective ECU issues?
6. Catalytic Converter - Catalytic converters at fault will lead to dropped fuel efficiency and performance along with increased emissions. Thus replace faulty parts now!
7. Diagnostic Tools - Use factory grade diagnostic tools to resolve OBD code P2573 error. Buy new diagnostic tools and equipment for us.

You might be thinking that how would you diagnose these problems? We at Parts Avatar Canada would help you diagnose the major symptoms easily.

Common Symptoms

• Visibility in the check engine light
• Engine may stall
• Drivability related issues
• Decline in engine performance
• Sound of hissing might start coming during acceleration

Looking out for some ways with the help of which you can correct this fault code? Then you have arrived at the correct place. We are here to help you out, so you must check out the steps mentioned below as follows:

• It is essential to restore the flawed direct ozone reduction catalyst deterioration sensor
• Repair or replace the quirky oxygen sensor
• Rehabilitate the defaults in the direct ozone reduction catalyst deterioration sensor harness
• Recondition the non-functioning direct ozone reduction catalyst deterioration sensor circuit
• It is necessary to perform proper service of the unsound exhaust system parts
• Adjust the flawed catalytic converter 

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Here are some steps which you should follow in order to diagnose this fault code:

• After verifying the P2573 code with an OBD-II scanner, the mechanic should begin with a visual inspection of all electrical components. The direct ozone reduction catalyst is utilized exclusively to reduce exhaust emissions in gasoline burning vehicles with internal combustion engines.
• The direct ozone reduction catalyst is an in line device which would resemble a muffler or resonator in exterior appearance although it differs greatly from either internally.
• The direct ozone reduction catalyst would get hotter than a muffler when the engine is running and especially immediately after the vehicle has been driven.
• Retarded ignition timing, lean fuel conditions, and misfires in the engine can rise direct ozone reduction catalyst temperatures to dangerous levels.
• There might be some cases where the direct ozone reduction catalyst will reach temperatures that cause it to become "red hot" and present a high risk from fire if flammable liquids are leaked or spilled thereon.
• The direct ozone reduction catalyst will utilize a system of interwoven fibers which contain a high concentrate of platinum packed tightly into the metal housing to restrict and filter excessive noxious oxide fragments.
• The noxious oxide fragments are then incinerated by the extreme temperatures (500 to 800-degrees Fahrenheit) found inside of the direct ozone reduction catalyst.
• Before you start with your process of diagnosis, verify that the direct ozone reduction catalyst is not under a manufacturer's warranty.
• Direct ozone reduction catalyst devices typically carry a 100,000-mile federally mandated warranty, regardless of vehicle year model.
• If the direct ozone reduction catalyst device is not under warranty, then you should start checking for leakages in the auto exhaust system.
• If exhaust leaks are detected (particularly before the catalytic converter), then they should be repaired as per the requirement, reset the code, and then the entire system should be retested. A lot of tools would be required to successfully diagnose this code if no exhaust leaks are detected.
• A suitable scanner, a digital volt/ohmmeter, and a temperature gun would be needed to perform a thorough diagnosis.
• After that start with the visual inspection of all wiring as well as connectors.
• Repair or restore damaged, disconnected, shorted, or corroded wiring, connectors, as well as other components as per the need.
• Make sure to retest the system once the repairs are completed to ensure success. If all system wiring, connectors, and components appear to be in good working order, then you should connect the scanner to the diagnostic connector and carefully record all stored codes as well as freeze frame data.
• This information might prove to be very helpful in diagnosing intermittent conditions that may have contributed to this code being stored.
• The code should then be cleared up and then the vehicle should be operated to see if it returns.
• This will help to decide whether or not the malfunction is intermittent.
• Once the codes have been cleared, tests drive the vehicle to see if the code returns.
• If the code has failed to return immediately, you may have an intermittent condition.
• Intermittent conditions can be quite challenging to diagnose and in extreme cases they should be allowed to worsen before a correct diagnosis can be made.
• Proceed by raising the vehicle and pointing the temperature gun at the exhaust pipe before and after the direct ozone reduction catalyst device.
• Then compare your findings with manufacturer's specifications.
• If your findings do not coincide with what the manufacturer recommends, then there are some faults in the direct ozone reduction catalyst device or temperature sensor.
• If your findings are in line with the manufacturer's specifications, then use the scanner and oscilloscope to monitor upstream and downstream oxygen sensor operation on the affected engine bank
• Start your car engine, test drive the vehicle, then park it and then the car engine should be allowed to stay idle.
• Once the car engine has reached normal operating temperature and the engine control system has entered closed loop operation, the upstream sensor should fluctuate rapidly from lean to rich (approximately .350 to .900 volts).
• The downstream oxygen sensor should find a reading near center (about .500 volts) and it should hold this reading as long as the engine idles.
• If the downstream oxygen sensor fluctuates in a similar manner to the upstream oxygen sensor, then there is surely some fault in the catalytic converter. If either the upstream or downstream oxygen sensors are slow to respond, or fail to respond, to changing engine conditions the respective sensor may be defective.
• However, if this is the case then an oxygen sensor code should also accompany the direct ozone reduction catalyst temperature code.
• Just remember to diagnose and repair oxygen sensor codes, fuel trim codes, fuel mixture codes, or misfire codes first before you start attempting to diagnose a direct ozone reduction catalyst temperature code.

Common Mistakes When Diagnosing The P2573 Code

• Many mechanics do not properly investigate the main reason which led to direct ozone reduction catalyst failure. The repeated direct ozone reduction catalyst failure would occur when there is presence of other codes and they are left unattended for long periods of time.
• Another mistake which is made by the technicians is that they simply replace the oxygen sensor without even verifying it. They often replace the oxygen sensors to avoid costly converter replacement. This would not solve the issue, but would lead to added expense.