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P2572 is a diagnostic trouble code (DTC) for "Direct Ozone Reduction Catalyst Deterioration Sensor Circuit 4". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.
P2572 is an OBD-II generic code for the engine control module (ECM) detecting the ozone reduction catalyst has deteriorated or the sensor has failed. Some problems may be from a defective regeneration system on diesel engines.
The ECM monitors the catalyst with sensors that measure the operation of the catalyst. When the catalyst sensor detects the catalyst, it will fall below specified limits for ozone reduction then it will turn on the Check Engine light and set the code P2572.
The catalyst is not operating correctly or the substrate inside it is contaminated or broken, allowing uncleaned exhaust to pass through it.
The catalyst sensor is not working to detect O2 levels and causing the failure.
The Check Engine light will be illuminated and the code is set in ECM memory as a fault. The light will stay on unless the problem goes away for at least 3 engine key cycles.
The vehicle may have reduced power due to the ECM failure strategy.
The vehicle may have rattling in the exhaust if the catalyst is broken apart.
The catalyst may glow red hot if the catalyst is plugged or partly melted.
Scans for codes and documents the code in the ECM and looks at the freeze frame data for the problem before clearing the codes and retesting.
Runs the regeneration of the catalyst on diesel engines than have this option.
Checks all the O2 sensors for correct readings and notes any problems to be diagnosed.
Checks the exhaust for broken catalysts or O2 sensor wires burned.
Removes the catalyst sensor and looks for contaminations from a bad catalyst.
Checks the connector and wiring for corrosion causing an open or short in the sensor circuit.
Clearing ECM memory codes before checking the freeze frame data for the main failure problem, so the failure may be duplicated and repaired
Failing to clear the ECM codes after the codes are fixed
Failing to run the regeneration for diesel engines before condemning the catalyst
Code P2572 is an indication that the ECM has got sensor signals that the catalyst is not cleaning the exhaust before it leaves the exhaust. This will fail an emission test.
Code P2572 is for the catalyst sensor for some diesel engines and the code can be due to the regeneration of the exhaust and has not run or the system has problems that need fixing for it. The regeneration system cleans soot from the exhaust catalyst and allows it to work cleaning the exhaust of ozone pollutants again.
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