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Engine-Codes – Generic – P047A

P047A Code - Exhaust Pressure Sensor 'B' Circuit

Quick Answer

The P047A code indicates a problem with the Exhaust Pressure Sensor 'B' Circuit in the vehicle. Common causes include Faulty Exhaust Pressure Sensor 'B', Wiring or connector issues in the circuit, ECM communication errors. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P047A indicates Exhaust Pressure Sensor 'B' Circuit.
Common causes
Common causes include Faulty Exhaust Pressure Sensor 'B', Wiring or connector issues in the circuit, ECM communication errors.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Aug 30, 2024
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Code P047A Description

The P047A code indicates a problem with the Exhaust Pressure Sensor 'B' Circuit in the vehicle. This sensor is responsible for measuring the pressure in the exhaust system and providing data to the engine control module (ECM) to ensure optimal engine performance and emissions control. When this circuit malfunctions, it can lead to issues with fuel efficiency, engine power, and emissions output. If left unresolved, it can potentially cause damage to other components of the exhaust system and lead to more serious engine problems.

OBDII Code P047A - Exhaust Pressure Sensor 'B' Circuit
P047A Code - Exhaust Pressure Sensor 'B' Circuit

Common Causes of P047A

  1. Faulty Exhaust Pressure Sensor 'B'
  2. Wiring or connector issues in the circuit
  3. ECM communication errors
  4. Exhaust leaks
  5. Carbon buildup in the exhaust system

Symptoms of P047A

  1. Check engine light illuminated on the dashboard
  2. Decreased fuel efficiency
  3. Engine misfires or rough idling
  4. Reduced engine performance or power
  5. Increased emissions output

How to Fix P047A

  1. Use a diagnostic scanner to retrieve the trouble code and confirm the issue.
  2. Inspect the Exhaust Pressure Sensor 'B' and its wiring for any visible damage or corrosion.
  3. Test the sensor's functionality using a multimeter to check for proper voltage and resistance.
  4. Replace the faulty Exhaust Pressure Sensor 'B' if necessary.
  5. Clear the trouble code from the ECM and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P047A

The typical repair costs for addressing the P047A code can range from $150 to $400, depending on the specific cause of the issue and the cost of replacement parts. It's important to note that diagnostic time and labor rates at auto repair shops can vary, so it's advisable to get a few quotes from different shops to find the best price for the repair.

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Code P047A Information for Specific Makes

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.

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