EGR Cooler Bypass Position Sensor Circuit High Bank 2

Where it lives

For P249A, the part to look at first is the sensor named here. The description of P249A puts it on bank 2.

Check these first

• A bank 2 bypass position sensor signal wire shorted to voltage
• A failed bank 2 bypass position sensor
• Debris blocking the bank 2 bypass flap travel
• An ECM that misreads the position signal

What to do next

1. Read the bank 2 EGR cooler bypass position sensor on a scan tool
2. Test the position sensor signal wire for a short to voltage
3. Check the bank 2 bypass flap for debris blockage
4. Verify the position sensor is seated and adjusted
5. Replace the bypass position sensor if the circuit tests good
6. Clear the code and retest

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