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P0472 Dodge Code - Exhaust Pressure Sensor Low

Quick Answer

The P0472 code for Dodge vehicles indicates a problem with the Exhaust Pressure Sensor, specifically that the sensor is reading a pressure that is lower than the expected range. Common causes include Faulty Exhaust Pressure Sensor: The sensor itself may be malfunctioning and providing incorrect readings to the engine control module, Wiring Issues: Damage or corrosion in the wiring connected to the sensor can disrupt the signal and lead to a low pressure reading, Exhaust System Leaks: Any leaks in the exhaust system could affect the pressure levels being monitored by the sensor, leading to inaccurate readings. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means
P0472 Dodge indicates Exhaust Pressure Sensor Low.
Common causes
Common causes include Faulty Exhaust Pressure Sensor: The sensor itself may be malfunctioning and providing incorrect readings to the engine control module, Wiring Issues: Damage or corrosion in the wiring connected to the sensor can disrupt the signal and lead to a low pressure reading, Exhaust System Leaks: Any leaks in the exhaust system could affect the pressure levels being monitored by the sensor, leading to inaccurate readings.
Severity
Moderate - service should be scheduled soon.
Can I drive?
The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
What is this?
Table of contents Created and updated by William Orellana on Sep 12, 2024
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Code P0472 Dodge Description

The P0472 code for Dodge vehicles indicates a problem with the Exhaust Pressure Sensor, specifically that the sensor is reading a pressure that is lower than the expected range. The Exhaust Pressure Sensor plays a critical role in monitoring the pressure levels in the exhaust system. This information is essential for the engine control module to adjust fuel delivery and optimize engine performance. When the sensor detects a low pressure reading, it can lead to a variety of issues that can affect the vehicle's performance, fuel efficiency, and emissions output.

OBDII Code P0472 Dodge - Exhaust Pressure Sensor Low
P0472 Dodge Code - Exhaust Pressure Sensor Low

Common Causes of P0472 Dodge

  1. Faulty Exhaust Pressure Sensor: The sensor itself may be malfunctioning and providing incorrect readings to the engine control module.
  2. Wiring Issues: Damage or corrosion in the wiring connected to the sensor can disrupt the signal and lead to a low pressure reading.
  3. Exhaust System Leaks: Any leaks in the exhaust system could affect the pressure levels being monitored by the sensor, leading to inaccurate readings.
  4. Diesel Particulate Filter (DPF) Problems: On diesel vehicles, issues with the DPF can impact exhaust pressure readings and trigger the P0472 code.
  5. Software or ECM Issues: In some cases, software glitches or problems with the engine control module (ECM) can cause erroneous sensor readings.

Symptoms of P0472 Dodge

  1. Check Engine Light: The most common symptom associated with the P0472 code is the illumination of the check engine light on the vehicle's dashboard.
  2. Reduced Power: The vehicle may experience a decrease in power and acceleration due to incorrect fuel delivery caused by the faulty sensor reading.
  3. Poor Fuel Efficiency: A malfunctioning Exhaust Pressure Sensor can lead to poor fuel efficiency as the engine may not be operating at optimal levels.
  4. Rough Idle: The engine may experience rough idling or irregular engine performance due to the incorrect pressure readings.
  5. Increased Emissions: With the sensor not functioning correctly, the vehicle may produce higher emissions than normal, potentially causing environmental concerns.

How to Fix P0472 Dodge

  1. Diagnose the Issue: Use a diagnostic scanner to retrieve the specific trouble code and pinpoint the exact cause of the low exhaust pressure reading.
  2. Inspect the Sensor: Check the Exhaust Pressure Sensor for any signs of damage or malfunction. Replace the sensor if necessary.
  3. Check Wiring Connections: Inspect the wiring connections to the sensor for any damage or corrosion. Repair or replace damaged wires as needed.
  4. Repair Exhaust Leaks: If any leaks are found in the exhaust system, repair or replace the affected components to ensure proper pressure readings.
  5. Address DPF Problems: For diesel vehicles, troubleshoot and repair any issues with the diesel particulate filter that may be affecting exhaust pressure readings.

Cost to Fix P0472 Dodge

The cost of repairing a P0472 code on a Dodge vehicle can vary depending on the specific cause of the issue and the extent of repairs needed. On average, the cost of replacing an Exhaust Pressure Sensor can range from $100 to $300, including parts and labor. However, additional costs may be incurred if wiring repairs, exhaust system fixes, or DPF maintenance are required. It is recommended to consult with a qualified mechanic or auto repair shop to get an accurate estimate based on the vehicle's make and model, as well as the local labor rates. Keep in mind that diagnostic time and labor rates can vary, so it's essential to inquire about these factors before proceeding with the repairs.

What does this mean?

Tech Notes for P0472 Dodge

Replacing the exhaust back pressure usually takes care of the problem

When is the Code Detected?

An Exhaust Back Pressure (EBP) signal that is detected out of range (high or low) by the Engine Control Module (ECM) will cause the engine to ignore the EBP signal and disable exhaust back pressure operation.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0472 Dodge Code

1. What are the common symptoms of OBDII code P0472 in a Dodge related to the Exhaust Pressure Sensor Low?

The common symptoms of OBDII code P0472 in a Dodge include decreased engine performance, reduced fuel efficiency, and potentially an illuminated Check Engine Light.

2. What are the possible causes of OBDII code P0472 indicating Exhaust Pressure Sensor Low in a Dodge?

Possible causes of OBDII code P0472 in a Dodge are a faulty exhaust pressure sensor, damaged wiring or connectors in the sensor circuit, or exhaust system blockages.

3. How can I diagnose OBDII code P0472 related to the Exhaust Pressure Sensor Low in my Dodge?

To diagnose OBDII code P0472 in a Dodge, you can use an OBDII scanner to retrieve the trouble code, visually inspect the exhaust pressure sensor and its wiring, and perform a pressure test on the exhaust system.

4. Can a clogged diesel particulate filter (DPF) cause OBDII code P0472 in a Dodge?

Yes, a clogged diesel particulate filter (DPF) can cause OBDII code P0472 in a Dodge by affecting the exhaust pressure readings and triggering the low-pressure sensor signal.

5. How should I repair OBDII code P0472 related to the Exhaust Pressure Sensor Low in my Dodge?

Repairing OBDII code P0472 in a Dodge involves replacing the faulty exhaust pressure sensor, repairing any damaged wiring or connectors, and addressing any exhaust system blockages, such as a clogged DPF.

6. Is it safe to continue driving my Dodge with OBDII code P0472 indicating Exhaust Pressure Sensor Low?

It is not recommended to continue driving your Dodge with OBDII code P0472 present, as it can lead to further damage to the engine and exhaust system components.

7. Can resetting the OBDII code P0472 in my Dodge make the issue go away temporarily?

Resetting the OBDII code P0472 in a Dodge may temporarily turn off the Check Engine Light, but the underlying issue causing the code will still need to be addressed to prevent further problems.

8. How much does it typically cost to repair OBDII code P0472 related to the Exhaust Pressure Sensor Low in a Dodge?

The cost to repair OBDII code P0472 in a Dodge can vary depending on the exact cause of the issue, but it generally ranges from $150 to $400 for parts and labor.

9. Can a DIY enthusiast without much experience fix OBDII code P0472 in a Dodge themselves?

While some DIY enthusiasts may be able to replace the exhaust pressure sensor or address wiring issues causing OBDII code P0472, it is recommended to consult a professional mechanic for proper diagnosis and repair.

10. How often does OBDII code P0472 related to Exhaust Pressure Sensor Low occur in Dodge vehicles?

OBDII code P0472 related to Exhaust Pressure Sensor Low can occur in Dodge vehicles with diesel engines, particularly in models equipped with exhaust pressure sensors as part of the emissions control system.

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