P2571 Fault Code

Direct Ozone Reduction Catalyst Temperature Sensor Circuit Intermittent/Erratic

• What does that mean?
• Symptoms
• Causes
• Solutions

The P2571 fault code indicates an intermittent or erratic signal from the Direct Ozone Reduction Catalyst Temperature Sensor Circuit. This sensor plays a critical role in monitoring the temperature of the catalytic converter, which is essential for optimizing emissions and engine performance. When the signal is unreliable or inconsistent, it can lead to improper functioning of the emissions system.

What are the symptoms of the P2571 code?

Symptoms associated with the P2571 code may include:

• Illuminated Check Engine Light: The most obvious sign is that the check engine light on the dashboard is on.
• Reduced Engine Performance: You may notice a decrease in engine power or efficiency.
• Increased Emissions: The vehicle may produce higher levels of harmful emissions due to catalyst inefficiency.
• Odd Engine Behavior: Symptoms such as rough idling or stalling could occur if the engine is running poorly.

What causes the P2571 code?

Common causes for this fault code include:

• Faulty Direct Ozone Reduction Catalyst Temperature Sensor: The sensor itself may be defective.
• Wiring Issues: Damaged, frayed, or corroded wiring or connectors could disrupt the signal.
• Poor Ground Connection: An inadequate ground can lead to erratic sensor readings.
• Engine Overheating: Persistent overheating can damage the sensor and its circuit.
• PCM Issues: A malfunctioning Powertrain Control Module may incorrectly interpret the sensor’s output.

How to fix P2571?

To resolve the P2571 fault code, consider the following steps:

• Inspect the Direct Ozone Reduction Catalyst Temperature Sensor for any signs of damage or wear.
• Check all associated wiring and connectors for signs of corrosion, damage, or loose connections.
• Ensure that the ground connections are secure and not corroded.
• Replace or repair faulty components as necessary, including the sensor, wiring, or PCM.
• Once repairs have been made, clear the fault codes and test drive the vehicle to ensure the issue is resolved.