P0472 Fault Code

Exhaust Pressure Sensor Low

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

The P0472 fault code indicates that the exhaust pressure sensor is reading a low voltage signal. This sensor is vital for measuring the pressure in the exhaust system, which helps the engine control module (ECM) adjust the air-fuel mixture for optimal performance.

• Low voltage readings usually suggest a fault or a problem in the exhaust pressure sensor circuit.
• When this occurs, it may affect the engine's performance and emissions control effectively.
• Understanding the exhaust pressure is essential for maintaining proper combustion and emissions regulations.

What are the symptoms of the P0472 code?

When the P0472 code is triggered, you may notice the following symptoms:

• Check Engine Light illuminated on the dashboard.
• Possible decrease in engine power or performance.
• Increased emissions due to improper air-fuel mixture.
• Potential rough idling or stalling when driving.
• In some cases, you may experience decreased fuel efficiency.

What causes the P0472 code?

The most common causes for a P0472 fault code include:

• A faulty exhaust pressure sensor that fails to operate correctly.
• Damaged wiring or connectors in the exhaust pressure sensor circuit, leading to poor signals.
• Blockage in the exhaust system that could influence exhaust pressure readings.
• Poor connection or corrosion at the sensor terminals.

How to fix P0472?

To resolve a P0472 fault code, you can follow these steps:

• Begin with a thorough inspection of the exhaust pressure sensor and associated wiring for any visible damage.
• Test the exhaust pressure sensor using a multimeter to check if it's functioning within the manufacturer's specifications.
• If the sensor is faulty, replace it with a new one as per the manufacturer's instructions.
• Repair any damaged wiring or connections within the sensor circuit.
• After repairs, clear the fault codes and take the vehicle for a test drive to ensure the problem is resolved and the Check Engine Light does not return.