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 a sensor in the car's exhaust system is not working properly. It's like a thermometer that sometimes gives the wrong temperature.
The code indicates an issue with the exhaust gas temperature sensor circuit, which is sending intermittent or erratic signals.
The Exhaust Gas Temperature (EGT) sensor measures the temperature of the exhaust gases. This information is used by the engine control module (ECM) to optimize engine performance and emissions. The P242E code is triggered when the ECM detects an intermittent or erratic signal from the EGT sensor located on Bank 1, Sensor 3.
• Check Engine Light is on
• Poor fuel economy
• Reduced engine performance
• Faulty exhaust gas temperature sensor
• Wiring issues such as frayed or damaged wires
• Poor electrical connections
ECM: Engine Control Module
EGT: Exhaust Gas Temperature
OBD-II: On-Board Diagnostics II
• Use an OBD-II scanner to confirm the code.
• Inspect the exhaust gas temperature sensor for damage.
• Check the wiring and connections for any issues.
• Replace the faulty exhaust gas temperature sensor.
• Repair or replace damaged wiring.
• Ensure all connections are secure and free of corrosion.
• OBD-II scanner
• Multimeter
• Wrench set
$150 - $300
Moderate
• Ford F-150
• Chevrolet Silverado
• Dodge Ram 1500
• Regularly inspect sensor connections.
• Avoid high exhaust temperatures by maintaining the engine.
• Use high-quality fuel to reduce emissions.
Sensor Issue
• Have the vehicle inspected by a professional if the Check Engine Light is on.
• Avoid driving with this code active for extended periods.
• Schedule regular maintenance checks.
Check with your vehicle manufacturer as sensors may be covered under emissions warranty.
This code has been more common in vehicles with high mileage or those that frequently tow heavy loads.
Moderate – It should be addressed soon to prevent further engine issues.
Driving with a malfunctioning sensor can lead to increased emissions and may not comply with local emissions laws.
• Engine at operating temperature
• Vehicle in a safe, stationary position
The sensor is located in the exhaust system on Bank 1, typically near the catalytic converter.
Q: Can I drive my car with a P242E code?
A: It's not recommended to drive for extended periods with this code as it can affect engine performance and emissions.
Q: How do I reset the Check Engine Light after fixing the issue?
A: You can use an OBD-II scanner to reset the light or disconnect the battery for a few minutes.
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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.