P2497 code meaning
EGR Cooler Bypass Position Sensor Circuit (Bank 2)
Powertrain system Generic code P24xx codes Check engine light
What P2497 means
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.
P2497 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.5 to 3 hours
- Clears after repairAfter a drive cycle
Symptoms of P2497
- Check engine light on
- Bypass on bank 2 no longer regulated
Common causes of P2497
- Most likelyDamaged wiring to the bank 2 position sensor
- PossibleConnector not latched or corroded
- Less likelyFailed position sensor or bypass valve
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
EGR cooler bypass position sensor b2
What each part of P2497 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 4 | Area: auxiliary emission controls (catalytic converter, EGR, EVAP). |
| 97 | The exact fault in that area. |
What to do next
- Note P2497 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2497
What does P2497 mean?
P2497 means "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. It is a generic code, so it means the same on every make.
Is it safe to drive with P2497?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P2497 fail an emissions test?
Yes, it can. P2497 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2497 to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P2497 clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.