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 has found a problem with a sensor that measures how hot the exhaust gases are. It's like a thermometer for the car's exhaust, and it's not working right.
The P2031 code indicates an issue with the exhaust gas temperature sensor circuit on bank 1, sensor 2. This sensor helps the engine control module (ECM) monitor and manage exhaust temperatures to optimize performance and emissions.
The exhaust gas temperature sensor measures the temperature of the exhaust gases exiting the engine. This information is used by the ECM to control various engine parameters, including fuel injection and turbocharger operation. Bank 1 refers to the side of the engine with cylinder 1, and sensor 2 is typically located further down the exhaust system.
• Check Engine Light is on
• Poor fuel economy
• Reduced engine performance
• Increased emissions
• Faulty exhaust gas temperature sensor
• Wiring issues such as shorts or open circuits
• Poor electrical connections
• Faulty ECM
ECM: Engine Control Module, the computer responsible for controlling engine functions.
Bank 1: The side of the engine containing cylinder 1.
Sensor 2: The second sensor in the exhaust system, typically located further downstream.
• Use an OBD-II scanner to confirm the code.
• Inspect the exhaust gas temperature sensor and its wiring for damage.
• Check the electrical connections for corrosion or looseness.
• Test the sensor's resistance and compare it to specifications.
• Replace the faulty exhaust gas temperature sensor.
• Repair or replace damaged wiring and connectors.
• Clear the code and test drive to ensure the issue is resolved.
• OBD-II scanner
• Multimeter
• Wrench set
$100 - $300
Moderate
• Ford F-150
• Chevrolet Silverado
• Dodge Ram
• Regularly inspect and maintain exhaust components.
• Ensure all electrical connections are secure and corrosion-free.
• Use quality replacement parts for repairs.
Sensor Issue
• If you notice a decrease in fuel efficiency, have your vehicle checked.
• Address the issue promptly to avoid further damage.
• Regular maintenance can prevent sensor failures.
Check your vehicle's warranty for coverage on emissions-related components.
The P2031 code has been associated with exhaust system issues in various vehicle models, often due to sensor or wiring problems.
Moderate – While not immediately critical, addressing this issue can prevent further problems and improve vehicle performance.
Driving with a malfunctioning exhaust sensor can lead to increased emissions, which may violate emissions regulations.
• Engine at operating temperature
• Vehicle in a safe, stationary position
The exhaust gas temperature sensor is located in the exhaust system, typically after the turbocharger or catalytic converter on bank 1.
Q: What happens if I ignore this code?
A: Ignoring the P2031 code can lead to decreased engine performance and increased emissions, potentially causing more serious engine issues over time.
Q: Can I drive my car with this code?
A: While the car may still be drivable, it's recommended to address the issue soon to avoid further damage and maintain optimal performance.
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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.