P252E Fault Code

Engine Oil Quality Circuit Intermittent/Erratic

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

The P252E fault code indicates an issue with the engine oil quality circuit, which is designed to monitor the oil's condition and ensure optimal engine performance. When this code appears, it suggests that there may be an intermittent or erratic signal from the oil quality sensor, potentially affecting the engine's efficiency and longevity.

What are the symptoms of the P252E code?

Drivers may experience various symptoms when the P252E code is triggered, including:

• Illuminated check engine light on the dashboard
• Decreased engine performance or power loss
• Unusual engine noises due to poor lubrication
• Increased oil consumption or the need for more frequent oil changes

What causes the P252E code?

The most common causes for the P252E code include:

• Faulty oil quality sensor
• Wiring issues such as frayed or shorted wires
• Poor connection at the sensor plug
• Contaminated or degraded engine oil
• Malfunctioning engine control module (ECM) that misinterprets signals

How to fix P252E?

To address the P252E fault code, the following steps are generally recommended:

• Inspect the oil quality sensor and its connections for any visible damage or corrosion.
• Check the wiring harness for signs of wear or short circuits.
• Replace the engine oil if it appears dirty or contaminated.
• If the sensor is faulty, replace it with a new one to ensure accurate readings.
• Clear the fault codes and perform a test drive to see if the issue is resolved.