The P2473: Exhaust Gas Temperature Sensor Circuit Bank 2 Sensor 4 refers to an issue with the exhaust gas temperature sensor circuit for Bank 2 Sensor 4. This may be caused by a faulty sensor, wiring issues, or a problem with connectors, potentially affecting exhaust temperature monitoring and leading to inefficient engine operation or increased emissions.
P2473 – Quick Overview
Code | Information |
---|---|
Meaning | P2473: Exhaust Gas Temperature Sensor Circuit Bank 2 Sensor 4 |
Is it serious? | Yes, this code can lead to inaccurate exhaust temperature monitoring, potentially causing engine inefficiencies and higher emissions. |
Possible causes | – Issues with the exhaust gas temperature sensor circuit for Bank 2 Sensor 4 – Faulty sensor – Wiring or connector problems |
How to diagnose? | – Inspect and test the exhaust gas temperature sensor circuit for Bank 2 Sensor 4 – Check wiring and connectors – Replace faulty sensor or components as needed |
P2473 Meaning
The P2473: Exhaust Gas Temperature Sensor Circuit Bank 2 Sensor 4 code indicates that there is an issue in the circuit associated with the exhaust gas temperature sensor for Bank 2 Sensor 4. This could be due to a problem with the sensor itself, faulty wiring, or poor connections, leading to incorrect temperature readings. This can affect the engine’s ability to maintain proper exhaust gas temperatures, impacting fuel efficiency and emissions control.
Step-by-step diagnostic guide
Action | Description | Tools Needed |
---|---|---|
Check for Other Codes | Use an OBD-II scanner to determine if there are any additional codes that could provide more context to the issue. | OBD-II Scanner |
Inspect Sensor and Wiring Visually | Examine the exhaust gas temperature sensor for visible damage. Inspect the wiring and connectors leading to Bank 2 Sensor 4 for signs of corrosion, fraying, or loose connections. | Flashlight, Safety Gloves |
Test the Sensor Circuit | Use a multimeter to test the circuit connected to Bank 2 Sensor 4. Check if the readings match the manufacturer’s specifications for proper operation. | Multimeter, Manufacturer’s Specifications |
Check for Wiring Integrity | Use a multimeter to test continuity in the wiring between the sensor and the control module. Move the wires while testing to detect any intermittent faults or damaged areas. | Multimeter |
Inspect Connectors | Verify that all connectors are secure and free of rust or other damage. Clean the connectors and ensure a solid connection. Replace any damaged connectors if necessary. | Contact Cleaner, Replacement Connectors |
Replace Faulty Sensor | If the exhaust gas temperature sensor is confirmed to be faulty, replace it with a new one. Ensure the replacement part meets manufacturer standards. | Replacement Sensor, Basic Hand Tools |
Clear Code and Test Drive | Clear the P2473 code using an OBD-II scanner, and take the vehicle for a test drive. Monitor the sensor readings to confirm that the issue has been resolved. | OBD-II Scanner, Vehicle Owner’s Manual |
Recheck for Codes | After completing the test drive, use an OBD-II scanner to verify if the P2473 code has been cleared and no other codes have appeared. If the code returns, further investigation may be necessary. | OBD-II Scanner |

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