Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means the car's computer is having trouble getting a steady reading from a temperature sensor in the exhaust system on one side of the engine.
The exhaust gas temperature sensor measures the temperature of the exhaust gases and sends this information to the car's computer. If the signal is not steady or is erratic, this code is triggered.
P2489 indicates that the exhaust gas temperature sensor located on bank 2, sensor 5, is sending intermittent or erratic signals to the engine control module (ECM). This can affect the vehicle's emissions control and performance.
• Check Engine Light is on
• Poor fuel economy
• Possible engine performance issues
• Faulty exhaust gas temperature sensor
• Wiring issues such as frayed wires or poor connections
• Corrosion or damage to the sensor connector
OBD-II: On-Board Diagnostics, a standardized system in vehicles for self-diagnosing and reporting.
ECM: Engine Control Module, the computer that controls engine functions.
• Use an OBD-II scanner to confirm the code and check for other related codes.
• Inspect the exhaust gas temperature sensor and its wiring for damage.
• Test the sensor's resistance and compare it to the manufacturer's specifications.
• Replace the faulty exhaust gas temperature sensor.
• Repair or replace damaged wiring or connectors.
• Clear the code and test drive the vehicle to ensure the issue is resolved.
• OBD-II scanner
• Multimeter
• Socket set
$100 - $300
Moderate
• Ford F-150
• Chevrolet Silverado
• Dodge Ram
• Regularly inspect sensors and wiring for damage.
• Ensure proper maintenance of the exhaust system.
• Avoid harsh driving conditions that can damage sensors.
Sensor Issue
• Address the issue promptly to avoid further damage.
• Consult a professional mechanic if unsure about repairs.
Check with the vehicle manufacturer for specific warranty coverage on sensors.
This code has been commonly reported in vehicles with high mileage or those exposed to harsh environmental conditions.
Moderate – While not immediately critical, it should be addressed to maintain vehicle performance and emissions standards.
Driving with a malfunctioning exhaust sensor can lead to increased emissions, which may not comply with legal standards.
• Engine at operating temperature
• Vehicle stationary and in park
The exhaust gas temperature sensor is located in the exhaust system, typically near the catalytic converter on bank 2.
Q: Can I drive with a P2489 code?
A: While the vehicle may still be drivable, it's best to address the issue to avoid potential damage and increased emissions.
Q: How can I reset the P2489 code?
A: After repairs, use an OBD-II scanner to clear the code. If the issue is fixed, it should not return.
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Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
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Fitment Required · Vehicle-fitment part
Relevant when catalyst-efficiency or emissions faults persist after proper diagnosis.
Catalyst-efficiency faults sometimes point toward converter problems after proper testing.
Catalytic converters are highly vehicle-specific and should not be purchased by code alone.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.