Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
Your car has a sensor that checks the pressure of the exhaust gases. This code means that the sensor is not working right or is giving strange readings.
The P047B code indicates that the Exhaust Pressure Sensor B is providing readings that are outside the expected range or not performing as it should.
The Exhaust Pressure Sensor B monitors the pressure of exhaust gases in the exhaust system. This sensor helps ensure the engine runs efficiently by providing data to the engine control module (ECM). When the ECM detects that the sensor's readings are outside the expected range or inconsistent, it triggers the P047B code.
• Check Engine Light is on
• Reduced engine performance
• Increased fuel consumption
• Faulty exhaust pressure sensor
• Wiring issues in the sensor circuit
• Exhaust leaks or blockages
Exhaust Pressure Sensor: A device that measures the pressure of exhaust gases in the exhaust system.
ECM: Engine Control Module, the computer that manages engine functions.
• Use an OBD-II scanner to verify the code.
• Inspect the exhaust pressure sensor and its wiring for damage.
• Check for exhaust leaks or blockages.
• Replace the faulty exhaust pressure sensor.
• Repair or replace damaged wiring or connectors.
• Fix any exhaust leaks or blockages.
• OBD-II scanner
• Multimeter
• Wrench set
$100 - $300
Moderate
• Ford F-Series
• Chevrolet Silverado
• Dodge Ram
• Regularly inspect the exhaust system.
• Ensure sensors are clean and functioning.
• Perform routine vehicle maintenance.
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 your vehicle manufacturer for specific warranty coverage on emissions-related components.
This code has been associated with exhaust sensor issues, which have become more common as emission standards have tightened.
Moderate – Addressing this issue can prevent further engine performance problems.
Driving with a faulty exhaust sensor can lead to increased emissions and potential fines in areas with strict emissions regulations.
• Engine at operating temperature
• Vehicle at idle or under load
The exhaust pressure sensor is typically located on or near the exhaust manifold or exhaust pipe.
Q: What happens if I ignore the P047B code?
A: Ignoring this code can lead to reduced engine performance and increased emissions.
Q: Can I drive my car with a P047B code?
A: While the car may still be drivable, it's best to address the issue to avoid further damage or performance issues.
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