Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer thinks the temperature of the exhaust gas (the gas that comes out of the car's tailpipe) is not what it should be. It's like when a thermometer says it's too hot or too cold outside.
The P2479 code is triggered when the exhaust gas temperature sensor on Bank 1, Sensor 2, reports a temperature outside the expected range.
The exhaust gas temperature sensor measures the temperature of the exhaust gases leaving the engine. Bank 1 Sensor 2 refers to the second sensor on the first bank of cylinders. If the sensor reads a temperature that is too high or too low compared to expected values, the engine control module (ECM) will set this code.
• Check Engine Light is on
• Poor fuel economy
• Reduced engine performance
• Faulty exhaust gas temperature sensor
• Wiring issues such as shorts or open circuits
• Exhaust leaks affecting sensor readings
Bank 1: The side of the engine with cylinder 1.
Sensor 2: The second sensor in the exhaust system, typically after the catalytic converter.
• Use an OBD-II scanner to confirm the code.
• Inspect the exhaust gas temperature sensor and wiring.
• Check for exhaust leaks near the sensor.
• Replace the faulty exhaust gas temperature sensor.
• Repair or replace damaged wiring.
• Fix any exhaust leaks.
• OBD-II scanner
• Multimeter
• Wrench set
$100 - $300
Moderate
• Ford F-150
• Chevrolet Silverado
• Dodge Ram
• Regularly inspect exhaust system for leaks.
• Ensure all sensors are properly connected.
• Perform routine maintenance checks.
Sensor Issue
• Have the vehicle inspected by a professional.
• Avoid driving long distances until the issue is resolved.
Check with your vehicle manufacturer for specific warranty coverage on emissions-related components.
This code has been associated with issues in vehicles equipped with advanced emissions systems, particularly in diesel engines.
Moderate – It should be addressed soon to avoid potential damage to the exhaust system.
Ignoring this code may lead to increased emissions, which could violate local emissions laws.
• Engine at operating temperature
• Vehicle in closed-loop operation
The exhaust gas temperature sensor is located in the exhaust system, typically after the catalytic converter on Bank 1.
Q: Can I drive with a P2479 code?
A: It's not recommended to drive for long periods with this code, as it may lead to further damage or increased emissions.
Q: How do I reset the P2479 code?
A: The code can be reset using an OBD-II scanner, but it's important to fix the underlying issue first.
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Fitment Required · Vehicle-fitment part
Relevant when catalyst-efficiency or emissions faults persist after proper diagnosis.
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Catalytic converters are highly vehicle-specific and should not be purchased by code alone.
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