P242E Fault Code

Exhaust Gas Temperature Sensor Circuit Intermittent/Erratic Bank 1 Sensor 3

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

The Exhaust Gas Temperature Sensor Circuit Intermittent/Erratic Bank 1 Sensor 3 indicates that the vehicle's exhaust gas temperature sensor for Bank 1, Sensor 3 is experiencing sporadic connectivity issues, leading to unreliable temperature readings.

• This sensor plays a critical role in monitoring the temperature of the exhaust gases.
• It helps the engine control unit (ECU) adjust the air-fuel mixture for optimal performance and emissions control.
• Frequent interruptions or erratic signals can compromise overall vehicle performance and increase emissions.

What are the symptoms of the P242E code?

Symptoms of this fault code may include:

• Illuminated check engine light on the dashboard.
• Poor acceleration or engine performance.
• Increased exhaust emissions, potentially failing an emissions test.
• Irregularities in engine idle or operation, especially during warm-up periods.

What causes the P242E code?

Common causes for this fault code include:

• Damaged or frayed wiring in the exhaust gas temperature sensor circuit.
• Faulty exhaust gas temperature sensor.
• Poor electrical connections or corroded connectors.
• Issues related to the engine control unit (ECU).
• Excessive heat exposure leading to sensor failure.

How to fix P242E?

To resolve the Exhaust Gas Temperature Sensor Circuit Intermittent/Erratic issue:

• Inspect the wiring and connectors associated with Bank 1 Sensor 3 for any signs of damage or corrosion.
• Test the exhaust gas temperature sensor with a multimeter to ensure it operates within the specified range.
• Replace the sensor if it is found to be defective.
• Clear any fault codes and perform a test drive to verify that the issue has been resolved.