Exhaust Gas Temperature Sensor Circuit Bank 1 Sensor 3

Where it lives

For P242A, the sensor sits on the circuit this code reports. The description of P242A puts it on bank 1.

Check these first

• A failed bank 1 sensor 3 exhaust gas temperature sensor
• An open or short in the sensor circuit
• A backed out pin at the sensor 3 connector
• Chafed wiring along the sensor 3 harness

What to do next

1. Read bank 1 sensor 3 exhaust gas temperature on a scan tool
2. Test the sensor 3 circuit for open and short faults
3. Check the sensor 3 connector pins
4. Verify reference and ground at the sensor
5. Replace the bank 1 sensor 3 EGT sensor if the wiring is good
6. Clear the code and retest

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