Exhaust Gas Temperature Sensor 2 Bank 1 Out of Range
The P2479 code indicates that the exhaust gas temperature (EGT) sensor 2 on bank 1 is reporting a temperature outside the expected range. This sensor monitors exhaust temperature to protect the catalytic converter and DPF from overheating. The out-of-range condition can be caused by a faulty sensor, wiring issues, or actual exhaust temperature extremes. If left unchecked, it may lead to reduced engine performance, increased emissions, or damage to emission control components.
01. Most Common Causes
- Faulty exhaust gas temperature sensor 2
- Open or shorted wiring or connector issues
- Exhaust leak near the sensor
- Engine running too hot or rich fuel mixture
02. Symptoms You Will Notice
- Check Engine Light on
- Reduced engine power or limp mode
- Poor fuel economy
- Possible overheating of catalytic converter
03. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm code P2479 and check for other related codes.
Step 2: Visually inspect the EGT sensor 2 (bank 1, sensor 2) for damage, corrosion, or loose connection.
Step 3: Test the sensor's resistance and compare to manufacturer specifications; replace if out of range.
Step 4: Check wiring and connector for shorts or opens; repair as needed.
Step 5: Clear the code and test drive to see if it returns.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as it can lead to catalytic converter or DPF damage. You may experience reduced power and fuel economy.
How much does it cost to fix?▼
Replacing the EGT sensor typically costs between $150 and $400 including parts and labor, depending on vehicle make and model.