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

Where it lives

For P242B, the part to look at first is the sensor named here. The description of P242B puts it on bank 1.

Check these first

• A bank 1 sensor 3 EGT reading outside its expected range
• An exhaust leak skewing the sensor 3 reading
• High resistance in the sensor 3 circuit
• A failing bank 1 sensor 3 EGT element

What to do next

1. Read bank 1 sensor 3 EGT on a scan tool and compare it to expected values
2. Inspect the bank 1 exhaust for leaks near sensor 3
3. Measure resistance of the sensor 3 wiring
4. Compare the sensor 3 reading to neighboring EGT sensors
5. Replace the bank 1 sensor 3 EGT sensor if the circuit tests good
6. Clear the code and retest

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