P2497 EGR Cooler Bypass Position Sensor Circuit (Bank 2)

P2497 is the generic circuit fault of the position sensor on the bank 2 cooler bypass, so it can only appear on engines whose second bank has its own EGR cooler with feedback-controlled flap. We found no manufacturer that documents a bank 2 bypass sensor; all published examples, such as GM's Duramax tables, are single-bank engines that use P2494 and P2495 on bank 1. The logic would be the same: the controller expects a voltage between fixed limits and flags the circuit when it is missing or implausible in a way not covered by the low and high codes. Bypass control on that bank is then usually suspended. A check of the connector, the 5 V supply and ground at the sensor comes first. The bank 1 equivalent is P2492.

Likely causes

Symptoms

• Check engine light on
• Bypass on bank 2 no longer regulated

Repair estimate

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

Related codes

References: law.cornell.edu, gsi.ext.gm.com.