Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer thinks there's a problem with the sensor that checks how much pressure is in the exhaust. It's like when you blow into a straw and cover the end, and the air can't get out. The sensor is supposed to measure that pressure, but it's not working right.
The P0471 code indicates that the exhaust pressure sensor is not providing a reading within the expected range or performance. This sensor helps the engine control module (ECM) monitor the pressure in the exhaust system.
The Exhaust Pressure Sensor A is responsible for measuring the pressure within the exhaust system. This data is used by the ECM to optimize engine performance and emissions. If the sensor's readings are outside the expected range, the ECM triggers the P0471 code.
• Check Engine Light illuminated
• Poor engine performance
• Increased emissions
• Faulty exhaust pressure sensor
• Wiring issues such as shorts or open circuits
• Exhaust leaks affecting sensor readings
ECM: Engine Control Module
OBD-II: On-Board Diagnostics II
• Use an OBD-II scanner to confirm the P0471 code.
• Inspect the exhaust pressure sensor and its wiring for damage.
• Check for exhaust leaks that might affect sensor readings.
• Replace the faulty exhaust pressure sensor.
• Repair or replace damaged wiring or connectors.
• Fix any exhaust leaks.
• OBD-II scanner
• Multimeter
• Basic hand tools
$100 - $300
Moderate
• Ford F-250
• Chevrolet Silverado
• Dodge Ram
• Regularly inspect exhaust system for leaks.
• Ensure proper maintenance of sensors.
• Use high-quality fuel to prevent sensor contamination.
Sensor Issue
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional if unsure.
• Regular maintenance can prevent sensor issues.
Check with the vehicle manufacturer for warranty coverage on emissions-related components.
The P0471 code has been common in diesel vehicles due to the importance of exhaust pressure in turbocharged engines.
Moderate – While the vehicle may still run, ignoring this issue can lead to increased emissions and reduced performance.
Driving with a malfunctioning exhaust system sensor can lead to increased emissions, which may not be compliant with local regulations.
• Engine running at operating temperature
• Vehicle in a safe, stationary position
The exhaust pressure sensor is typically located near the exhaust manifold or turbocharger.
Q: Can I drive with a P0471 code?
A: While you can drive with this code, it's not recommended as it can lead to increased emissions and reduced engine performance.
Q: How do I clear a P0471 code?
A: After fixing the issue, you can clear the code with an OBD-II scanner. However, if the problem persists, the code will return.
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