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.
Medium severity. Can I keep driving?You can normally drive in moderation, but get it repaired soon: if the valve is stuck open, the engine may idle very poorly.
Bank 2 is the side without cylinder 1, so it only exists on V or boxer engines.
Symptoms
- Check engine light on
- Bypass on bank 2 no longer regulated
Most likely causes
- Damaged wiring to the bank 2 position sensor
- Connector not latched or corroded
- Failed position sensor or bypass valve
What to check, in order
Start with the simplest. You can tick off each step.
Good to know
- Repair difficulty: medium
- It affects emissions.
What each character of P2497 means
- P: Powertrain: engine and transmission
- 2: Generic code: same on every make
- 4: Emissions
- 97: Specific fault in that system
Frequently asked questions
Can I keep driving with code P2497?
You can normally drive in moderation, but get it repaired soon: if the valve is stuck open, the engine may idle very poorly.
What causes code P2497?
The most common causes are: damaged wiring to the bank 2 position sensor; connector not latched or corroded; failed position sensor or bypass valve.
Related codes
- P2492EGR Cooler Bypass Position Sensor Circuit (Bank 1)
- P2498EGR Cooler Bypass Position Sensor Range/Performance (Bank 2)
- P2499EGR Cooler Bypass Position Sensor Circuit Low (Bank 2)
- P249AEGR Cooler Bypass Position Sensor Circuit High (Bank 2)
- P249BEGR Cooler Bypass Position Sensor Circuit Intermittent/Erratic (Bank 2)
Sources
Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.