P252D Fault Code

Engine Oil Quality Sensor Circuit High

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

The P252D fault code indicates a problem with the Engine Oil Quality Sensor Circuit, specifically when the signal is reading higher than expected. This sensor plays a crucial role in assessing the condition of your engine oil, which is vital for optimal engine performance and longevity. If this code appears, it's important to address it promptly to avoid potential engine damage.

What are the symptoms of the P252D code?

A vehicle experiencing this fault code may exhibit several symptoms, such as:

• Warning lights on the dashboard indicating oil quality issues
• Reduced engine performance due to potential oil lubrication problems
• Unusual engine noise or knocking, indicating inadequate oil quality
• Frequent necessity for oil changes due to contamination

What causes the P252D code?

The high reading from the Engine Oil Quality Sensor can result from several factors including:

• Faulty oil quality sensor
• Electrical issues such as damaged wiring or connectors
• Low engine oil levels or dirty oil
• Issues with the engine control module (ECM) interpreting the sensor's data incorrectly

How to fix P252D?

To resolve the P252D fault code, consider the following steps:

• Inspect and potentially replace the engine oil quality sensor if faulty.
• Check the wiring and connectors for any signs of damage or corrosion.
• Ensure proper oil levels are maintained and replace any dirty or contaminated oil.
• Use high-quality oil that meets the manufacturer's specifications and consider resetting the ECM to clear the fault.