Fix P2573: STEP-BY-STEP diagnostic GUIDE!

The P2573: Direct Ozone Reduction Catalyst Deterioration Sensor Circuit Range/Performance code indicates that the sensor monitoring the direct ozone reduction catalyst is detecting values that are out of the normal operating range or showing performance issues. This could be due to a faulty sensor, poor connections, or wiring problems that are affecting the signal quality.

P2573 – Quick Overview

CodeInformation
MeaningP2573: Direct Ozone Reduction Catalyst Deterioration Sensor Circuit Range/Performance
Is it serious?Yes, as range or performance issues with the sensor can prevent the proper monitoring of the catalyst’s condition, reducing the effectiveness of emissions control.
Possible causes– Range or performance issues with the direct ozone reduction catalyst deterioration sensor circuit
– Faulty direct ozone reduction catalyst deterioration sensor
– Wiring or connector problems
How to diagnose?– Test the range and performance of the direct ozone reduction catalyst deterioration sensor circuit
– Inspect and test the direct ozone reduction catalyst deterioration sensor
– Check wiring and connectors
– Replace faulty components if needed

P2573 Meaning

The P2573: Direct Ozone Reduction Catalyst Deterioration Sensor Circuit Range/Performance code means that the readings from the sensor monitoring the catalyst are outside of the expected performance range. This can indicate that the sensor is malfunctioning or that the catalyst is not functioning properly. Issues could arise from problems with the sensor itself, incorrect wiring, or poor electrical connections that result in erratic or incorrect signals being sent to the Engine Control Module (ECM).

Step-by-step diagnostic guide

ActionDescriptionTools Needed
Check for Other Related CodesUse an OBD-II scanner to determine if there are additional codes related to the emissions system or the catalyst sensor that might help identify the issue.OBD-II Scanner
Test the Range and Performance of the Catalyst Deterioration Sensor CircuitUse a multimeter or diagnostic tool to measure the output from the catalyst deterioration sensor. Compare the readings against manufacturer specifications to verify if the sensor is working within the expected range.Multimeter, Diagnostic Tool
Inspect the Catalyst Deterioration SensorVisually inspect the sensor for any signs of damage, corrosion, or dirt that could be affecting its ability to measure the catalyst’s condition. Ensure it is securely mounted.Flashlight, Safety Gloves
Test the Direct Ozone Reduction Catalyst Deterioration SensorUse a diagnostic tool to observe the live data from the sensor during various engine conditions. Verify that the readings are stable and within the specified parameters. If the sensor fluctuates or shows incorrect values, it may be faulty.Diagnostic Tool, Multimeter
Check Wiring and ConnectorsInspect all wiring and connectors associated with the sensor. Look for frayed wires, corrosion, loose connections, or short circuits that could affect signal quality and result in an incorrect performance range.Flashlight, Multimeter
Repair or Replace Faulty Wiring/ConnectorsRepair any damaged wiring or replace corroded connectors to restore proper electrical continuity. All connections should be tight and corrosion-free for accurate signal transmission.Basic Tools, Replacement Parts
Replace the Faulty Catalyst Deterioration SensorIf testing shows that the sensor is not operating correctly or its output is inconsistent, replace it with a new sensor. Ensure the replacement sensor is properly calibrated and installed.Replacement Catalyst Deterioration Sensor
Clear the Code and Test DriveAfter repairs are complete, use an OBD-II scanner to clear the fault code. Drive the vehicle to ensure proper operation of the emissions system, checking that the sensor reads correctly and that no error codes return.OBD-II Scanner, Vehicle Owner’s Manual
Recheck for CodesRe-scan the vehicle after the test drive to confirm that the P2573 code has been resolved. If the code persists, further diagnostics may be required to determine the underlying issue.OBD-II Scanner

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