Exhaust Gas Temperature Sensor 1/3 Correlation Bank 1

Where it lives

For P20E3, the part to look at first is the sensor named here. The description of P20E3 puts it on bank 1.

Check these first

• An exhaust gas temperature sensor 1 and sensor 3 bank 1 that will not correlate
• An open or short in one of the bank 1 exhaust gas temperature sensor circuits
• An exhaust leak between the two sensors
• Heavy particulate matter buildup on one sensor

What to do next

1. Read exhaust gas temperature sensors 1 and 3 bank 1 on a scan tool
2. Compare the two readings under the same operating condition
3. Inspect the exhaust for leaks between the sensors
4. Inspect both sensor connectors and wiring
5. Replace the sensor that reads out of line with the other
6. Clear the code and retest

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