The P247B: Exhaust Gas Temperature Out of Range Bank 1 Sensor 4 indicates that the exhaust gas temperature reading from Bank 1 Sensor 4 is outside the expected range. This problem could be due to a faulty sensor or issues within the sensor circuit, leading to incorrect exhaust temperature management, which can negatively affect engine performance and emissions control.
P247B – Quick Overview
Code | Information |
---|---|
Meaning | P247B: Exhaust Gas Temperature Out of Range Bank 1 Sensor 4 |
Is it serious? | Yes, incorrect exhaust temperature readings may lead to improper engine performance and elevated emissions, which could ultimately cause long-term damage if not addressed. |
Possible causes | – Exhaust gas temperature reading is out of expected range for Bank 1 Sensor 4 – Faulty sensor – Issues with the sensor circuit |
How to diagnose? | – Inspect the exhaust gas temperature sensor for Bank 1 Sensor 4 – Check the sensor circuit for any issues – Replace faulty components if needed |
P247B Meaning
The P247B: Exhaust Gas Temperature Out of Range Bank 1 Sensor 4 code signifies that the sensor for monitoring the exhaust gas temperature at Bank 1 Sensor 4 is reporting values that are beyond the expected range. This could result from a faulty sensor, damaged wiring, or a problem in the sensor circuit, which can affect how efficiently the engine manages exhaust gases and lead to potential performance or emission issues.
Step-by-step diagnostic guide
Action | Description | Tools Needed |
---|---|---|
Check for Other Codes | Use an OBD-II scanner to check if there are any other related codes. Other codes may provide clues to help identify the underlying issue affecting the sensor. | OBD-II Scanner |
Inspect Sensor and Wiring Visually | Examine the exhaust gas temperature sensor for physical damage such as cracks, burns, or discoloration. Check the wiring leading to Bank 1 Sensor 4 for any signs of fraying, wear, or corrosion that could disrupt proper sensor operation. | Flashlight, Safety Gloves |
Test Sensor Output | Use a diagnostic tool to measure the real-time output from the exhaust gas temperature sensor for Bank 1 Sensor 4 while the engine is running. Compare these readings to the manufacturer’s specifications to determine if the sensor is giving incorrect values. | Diagnostic Tool, Manufacturer’s Specifications |
Check Sensor Circuit Continuity | Use a multimeter to test the continuity and resistance of the sensor circuit. Ensure there are no open circuits, high resistance, or shorts that could lead to out-of-range readings. | Multimeter |
Inspect and Clean Connectors | Verify that the connectors to the sensor are clean and properly connected. Use contact cleaner if there is dirt or corrosion present. Replace any damaged connectors to ensure a secure electrical connection. | Contact Cleaner, Replacement Connectors |
Replace Faulty Sensor or Components | If the exhaust gas temperature sensor is found to be faulty, replace it with a new, manufacturer-approved component. Also, replace any wiring or connectors that are not in good condition. | Replacement Sensor, Basic Hand Tools |
Clear Code and Test Drive | Clear the P247B code using an OBD-II scanner and conduct a test drive to monitor the sensor’s performance and ensure that the exhaust temperature is within the expected range. | OBD-II Scanner, Vehicle Owner’s Manual |
Recheck for Codes | After the test drive, use the OBD-II scanner again to verify that the P247B code has been cleared and no new codes have been detected. If the code persists, further investigation will be needed. | 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)