P242B Fault Code

Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 1 Sensor 3

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

The P242B fault code indicates a problem with the exhaust gas temperature (EGT) sensor circuit range or performance for Bank 1 Sensor 3. This sensor is critical in monitoring the temperature of exhaust gases, which helps in optimizing engine performance and reducing emissions. When this code is triggered, it generally points to issues such as the sensor itself being faulty, wiring problems, or other related components malfunctioning.

What are the symptoms of the P242B code?

Common symptoms associated with the P242B code include:

• The check engine light illuminated on the dashboard.
• Decreased engine performance, such as reduced power or acceleration.
• Increased fuel consumption due to improper sensor readings.
• Potential engine stalling or rough idling.
• Emissions test failure if not addressed.

What causes the P242B code?

Factors leading to a P242B code may include:

• A malfunctioning exhaust gas temperature sensor.
• Damaged wiring or connectors within the sensor circuit.
• Issues with the engine control module (ECM) that processes the sensor data.
• Exhaust leaks that can affect sensor readings.
• Accumulation of carbon deposits or corrosion on the sensor.

How to fix P242B?

To resolve a P242B fault code, the following steps can be taken:

• Inspect and test the EGT sensor for proper functionality, replacing it if necessary.
• Check the wiring and connectors for damage or corrosion, repairing or replacing them as needed.
• Ensure there are no exhaust leaks that could skew sensor readings.
• If all else checks out, inspect the engine control module for faults or software updates.
• Clear the fault code and verify whether it returns after the repair.