The P2479: Exhaust Gas Temperature Out of Range Bank 1 Sensor 2 indicates that the exhaust gas temperature reading from Bank 1 Sensor 2 is outside the expected range. This can be due to a malfunctioning sensor or issues with the sensor circuit, which may lead to improper regulation of exhaust temperatures, affecting engine performance and emissions.
P2479 – Quick Overview
| Code | Information |
|---|---|
| Meaning | P2479: Exhaust Gas Temperature Out of Range Bank 1 Sensor 2 |
| Is it serious? | Yes, incorrect exhaust temperature readings can result in poor exhaust gas management, potentially impacting engine efficiency and causing increased emissions. |
| Possible causes | – Exhaust gas temperature reading is out of expected range for Bank 1 Sensor 2 – Faulty sensor – Issues with the sensor circuit |
| How to diagnose? | – Inspect the exhaust gas temperature sensor for Bank 1 Sensor 2 – Check the sensor circuit for any issues – Replace faulty components if needed |
P2479 Meaning
The P2479: Exhaust Gas Temperature Out of Range Bank 1 Sensor 2 code means that the exhaust gas temperature sensor for Bank 1 Sensor 2 is sending readings that are not within the expected range. This may indicate a malfunctioning sensor, faulty wiring, or an issue with the circuit, which can prevent the engine control module from effectively managing exhaust temperatures, leading to performance issues or non-compliance with emissions standards.
Step-by-step diagnostic guide
| Action | Description | Tools Needed |
|---|---|---|
| Check for Other Codes | Use an OBD-II scanner to check for any additional codes that may provide more context or indicate related issues. These related codes can help in narrowing down the problem. | OBD-II Scanner |
| Inspect Sensor and Wiring Visually | Examine the exhaust gas temperature sensor for any visible damage, such as cracks, soot buildup, or deformation. Check the wiring and connectors for signs of wear, damage, or corrosion that could lead to inaccurate readings. | Flashlight, Safety Gloves |
| Test Sensor Output | Use a diagnostic tool to measure the real-time output of the exhaust gas temperature sensor for Bank 1 Sensor 2 while the engine is running. Compare the sensor readings against manufacturer specifications to verify if they are within the normal range. | Diagnostic Tool, Manufacturer’s Specifications |
| Check Sensor Circuit Continuity | Use a multimeter to test the continuity and resistance of the wiring for Bank 1 Sensor 2. Ensure there are no open circuits, shorts, or resistance issues that could be affecting the accuracy of the sensor. | Multimeter |
| Inspect Connectors | Check the connectors leading to the exhaust gas temperature sensor. Ensure that all connectors are properly secured and free of dirt, moisture, or corrosion. Clean or replace the connectors if necessary to ensure a stable connection. | Contact Cleaner, Replacement Connectors |
| Replace Faulty Sensor or Components | If the sensor or any part of the sensor circuit is found to be defective, replace it with an appropriate component that meets the manufacturer’s specifications. Secure all connections properly to avoid recurring issues. | Replacement Sensor, Basic Hand Tools |
| Clear Code and Test Drive | After replacing any faulty components, clear the P2479 code using an OBD-II scanner. Conduct a test drive to monitor the sensor’s performance and confirm that the exhaust temperature readings are back to normal. | OBD-II Scanner, Vehicle Owner’s Manual |
| Recheck for Codes | After the test drive, use the OBD-II scanner again to ensure that the P2479 code has been cleared and that no new codes have been logged. 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)