P242D Fault Code

Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 3

• What does that mean?
• Symptoms
• Causes
• Solutions

The P242D fault code indicates that the Exhaust Gas Temperature (EGT) Sensor Circuit for Bank 1 Sensor 3 is reporting a high voltage condition. This sensor plays a crucial role in the vehicle's emissions system by monitoring the temperature of the exhaust gases as they exit the engine. If the sensor detects a temperature that is higher than the expected range, it can trigger the Check Engine Light and cause the engine control unit (ECU) to enter a limp mode to prevent further damage to the vehicle's emission systems.

What are the symptoms of the P242D code?

• Check Engine Light illuminated
• Increased emissions output
• Decreased fuel efficiency
• Possible engine performance issues
• Erratic engine behavior

What causes the P242D code?

• Faulty EGT sensor
• Short circuit in the wiring harness
• Poor electrical connections
• Malfunctioning engine control unit (ECU)
• Exhaust system blockages that raise exhaust temperatures

How to fix P242D?

• Inspect the EGT sensor for physical damage or corrosion
• Check the wiring harness for shorts, frays, or loose connections
• Test the EGT sensor with a multimeter to ensure it is functioning within normal specifications
• Replace the EGT sensor if it is found to be faulty
• Clear the fault codes and perform a road test to ensure the issue is resolved