P2528 Fault Code

Vacuum Reservoir Pressure Sensor Circuit High

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

The P2528 fault code indicates that the vacuum reservoir pressure sensor circuit is experiencing a high voltage condition. This sensor is critical for monitoring the vacuum pressure in the vehicle's intake system, which is essential for optimal engine performance. When the voltage reading exceeds the expected range, the engine control module (ECM) triggers this fault code to alert the driver of a potential issue.

What are the symptoms of the P2528 code?

Common symptoms associated with the P2528 fault code may include:

• Illuminated check engine light (CEL) or service engine soon light.
• Poor engine performance such as rough idling or stalling.
• Decreased fuel efficiency due to improper air-fuel mixture.
• Increased emissions due to improper engine operation.

What causes the P2528 code?

There are several potential causes for the high voltage reading from the vacuum reservoir pressure sensor circuit, including:

• A faulty vacuum reservoir pressure sensor that is providing incorrect readings.
• Damaged wiring or connectors in the sensor circuit, leading to short circuits.
• A vacuum leak in the system causing erratic pressure readings.
• Issues with the engine control module that may cause incorrect interpretation of sensor data.

How to fix P2528?

To resolve the P2528 fault code, the following steps should be taken:

• Inspect the vacuum reservoir pressure sensor for any visible damage or corrosion.
• Check the wiring and connectors for signs of wear, fraying, or short circuits.
• Test the vacuum pressure sensor with a multimeter to ensure it operates within the manufacturer's specifications.
• Repair or replace any damaged components, and clear the fault codes using an OBD-II scanner.
• If issues persist, further diagnostic tests may be needed to pinpoint other underlying problems with the engine control module or intake system.