Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 3

Where it lives

For P242D, the circuit described runs through the sensor. The description of P242D puts it on bank 1.

Check these first

• A short to voltage on the bank 1 sensor 3 EGT signal wire
• An open in the sensor 3 ground circuit
• A failed bank 1 sensor 3 EGT sensor
• High exhaust temperature at sensor 3 from overfueling

What to do next

1. Read bank 1 sensor 3 EGT on a scan tool
2. Test the sensor 3 signal wire for a short to voltage
3. Check the sensor 3 ground circuit
4. Verify the reading against actual exhaust temperature
5. Replace the bank 1 sensor 3 EGT sensor if the circuit tests good
6. Clear the code and retest

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