The P047D: Exhaust Pressure Sensor ‘B’ Circuit High refers to an issue where the exhaust pressure sensor ‘B’ is sending a higher-than-expected voltage signal. This can be caused by a faulty sensor, excessive voltage supply, or wiring issues, such as short circuits. When this code is triggered, it can affect exhaust pressure regulation and engine performance.
P047D – Quick Overview
| Meaning | P047D: Exhaust Pressure Sensor ‘B’ Circuit High |
| Is it serious? | Yes, a high voltage signal can cause improper exhaust pressure readings, affecting engine performance and emissions. |
| Possible causes | – Faulty exhaust pressure sensor – High voltage supply – Wiring issues |
| How to diagnose? | – Test the exhaust pressure sensor for high input – Verify voltage supply to the sensor – Inspect wiring for shorts or damage |
P047D Meaning
The P047D: Exhaust Pressure Sensor ‘B’ Circuit High means that the sensor monitoring exhaust pressure is reporting a voltage that is too high. This can be caused by a malfunctioning sensor, excessive voltage from the power supply, or damaged wiring. Incorrect exhaust pressure readings can lead to engine performance issues and increased emissions.
Step-by-step diagnostic guide
| Action | Description | Tools Needed |
|---|---|---|
| Check for Other Codes | Use an OBD-II scanner to check for other related codes that could help diagnose the issue. | OBD-II Scanner |
| Inspect the Exhaust Pressure Sensor ‘B’ | Visually inspect the sensor for signs of damage or loose connections. Ensure it is properly mounted. | Flashlight, Safety Gloves |
| Test the Exhaust Pressure Sensor for High Input | Use a multimeter to test the voltage input of the sensor and compare the readings to the manufacturer’s specifications. | Multimeter, Manufacturer’s Specifications |
| Verify Voltage Supply | Ensure that the sensor is receiving the appropriate voltage. If the voltage is too high, inspect the power source and associated connections. | Multimeter, Vehicle’s Wiring Diagram |
| Inspect Wiring for Shorts or Damage | Carefully check the wiring and connectors for shorts, damage, or signs of wear. Repair any wiring issues. | Flashlight, Multimeter |
| Repair or Replace Faulty Components | If the sensor or wiring is found to be faulty, repair or replace the necessary components to restore proper functionality. | Wire Strippers, Replacement Exhaust Pressure Sensor |
| Clear the Code and Test Drive | After completing repairs, clear the P047D code using an OBD-II scanner. Test drive the vehicle to ensure the issue has been resolved. | OBD-II Scanner, Vehicle Owner’s Manual |
| Recheck for Codes | After the test drive, re-scan the vehicle to ensure the P047D code has not returned. If it does, further diagnosis may be necessary. | OBD-II Scanner |
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Hi, I am Juraj “Yuri” Lukacko. I got frustrated by unhelpful and scammy mechanics, so I decided to learn everything about car diagnostics myself. I test dozens of new car diagnostic tools every month along with learning new strategies to fix and customize cars. About Juraj Lukacko (Yuri)