P242C Fault Code

Exhaust Gas Temperature Sensor Circuit Low Bank 1 Sensor 3

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

The P242C fault code indicates an issue with the Exhaust Gas Temperature (EGT) sensor circuit for Bank 1, Sensor 3. This sensor is critical for monitoring the temperature of the exhaust gases and helps the vehicle's engine control unit manage fuel injection and emissions effectively.

• It is part of the emissions control system, contributing to overall vehicle performance.
• A low signal from this sensor may suggest a fault in the wiring, the sensor itself, or a related component.
• This code can trigger the check engine light, and it is important to diagnose it promptly to avoid engine performance issues.

What are the symptoms of the P242C code?

Drivers may notice several symptoms when the P242C code is triggered:

• Activation of the check engine light on the dashboard.
• Decreased fuel efficiency due to improper combustion management.
• Possible loss of engine power or poor acceleration.
• Higher emissions levels during vehicle inspection.
• The engine may enter limp mode in some vehicles, restricting performance.

What causes the P242C code?

Several factors can lead to a P242C fault code such as:

• A malfunctioning Exhaust Gas Temperature sensor that fails to provide accurate readings.
• Damaged or corroded wiring or connections within the sensor circuit.
• Contamination of the sensor from exhaust soot or other debris.
• Faulty engine components leading to abnormal exhaust temperatures.

How to fix P242C?

To resolve the P242C fault code, the following steps are generally recommended:

• Start by performing a thorough diagnostic scan to confirm the P242C code is present.
• Inspect the Exhaust Gas Temperature (EGT) sensor for any visible damage or contamination and replace it if necessary.
• Check the wiring and connectors for corrosion or damage; repair or replace them if found faulty.
• Clear the error code and take the vehicle for a test drive to see if the code returns.
• If the issue persists, further inspection may be needed, including checking associated components in the exhaust system.