The P2570: Direct Ozone Reduction Catalyst Temperature Sensor Circuit High code indicates that there is a high voltage or signal in the circuit of the direct ozone reduction catalyst temperature sensor. This could be due to a faulty sensor, a short circuit, or issues with the wiring or connectors that are causing an abnormally high reading, which can lead to improper operation of the emissions control system.
P2570 – Quick Overview
Code | Information |
---|---|
Meaning | P2570: Direct Ozone Reduction Catalyst Temperature Sensor Circuit High |
Is it serious? | Yes, high voltage in the sensor circuit can lead to incorrect monitoring of the catalyst temperature, potentially affecting emissions performance and efficiency. |
Possible causes | – High voltage or signal in the direct ozone reduction catalyst temperature sensor circuit – Faulty direct ozone reduction catalyst temperature sensor – Wiring or connector issues |
How to diagnose? | – Measure the voltage in the direct ozone reduction catalyst temperature sensor circuit – Inspect and test the direct ozone reduction catalyst temperature sensor – Check wiring and connectors – Replace faulty components if needed |
P2570 Meaning
The P2570: Direct Ozone Reduction Catalyst Temperature Sensor Circuit High code means that the voltage from the temperature sensor in the direct ozone reduction catalyst circuit is above the acceptable range. This high signal may be caused by a short to power, a failing sensor, or wiring and connector problems. A high voltage reading can prevent the emissions system from functioning effectively, leading to increased pollutants.
Step-by-step diagnostic guide
Action | Description | Tools Needed |
---|---|---|
Check for Other Related Codes | Use an OBD-II scanner to determine if there are other fault codes related to the emissions system that could provide additional context. | OBD-II Scanner |
Measure Voltage in the Sensor Circuit | Use a multimeter to measure the voltage of the direct ozone reduction catalyst temperature sensor circuit. Compare the voltage with the manufacturer’s specifications to verify if it is higher than the expected range. | Multimeter |
Inspect the Direct Ozone Reduction Catalyst Temperature Sensor | Visually inspect the sensor for signs of damage, corrosion, or overheating. Make sure it is properly mounted and that there is no damage to the sensor itself. | Flashlight, Safety Gloves |
Test the Temperature Sensor | Use a diagnostic tool to observe real-time data from the temperature sensor. Ensure that the sensor readings are consistent and within the expected range under different engine and exhaust conditions. | Diagnostic Tool |
Check Wiring and Connectors | Inspect all the wiring and connectors associated with the sensor. Look for short circuits, exposed wires, loose connections, or corrosion that could be causing the high voltage condition. | Flashlight, Multimeter |
Repair or Replace Faulty Wiring/Connectors | If damaged wiring or connectors are found, repair or replace them to restore the proper functionality of the circuit. Ensure all connections are tight and corrosion-free. | Basic Tools, Replacement Parts |
Replace the Faulty Temperature Sensor | If the sensor itself is found to be defective, replace it with a new one. Ensure that the replacement sensor is compatible and properly installed for accurate temperature monitoring. | Replacement Catalyst Temperature Sensor |
Clear the Code and Test Drive | After completing the repairs, use an OBD-II scanner to clear the fault code. Start the vehicle and allow it to run, observing the sensor readings to confirm normal operation. Perform a test drive to check the emissions system performance. | OBD-II Scanner, Vehicle Owner’s Manual |
Recheck for Codes | Re-scan the vehicle after the test drive to ensure the P2570 code has been resolved. If the code reappears, additional diagnostics may be required to further isolate and address the issue. | OBD-II Scanner |

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Hi, I am Juraj “Yuri” Lukacko. I got frustrated by unhelpful and scammy mechanics, so I decided to learn everything about car diagnostics myself. I test dozens of new car diagnostic tools every month along with learning new strategies to fix and customize cars. About Juraj Lukacko (Yuri)