P2498 code meaning
EGR Cooler Bypass Position Sensor Range/Performance (Bank 2)
Powertrain system Generic code P24xx codes Check engine light
What P2498 means
With P2498 the bank 2 bypass position signal is electrically valid but not believable, for example because it does not change when the flap is commanded, settles at an unexpected value or no longer matches the end stops learned earlier. There is no public manufacturer description for this bank 2 code. The closest documented case is bank 1: GM's 2015 LML Duramax showed P2493 together with other bypass sensor codes, and GM's answer was a complete new bypass valve, because sensor and valve form one unit. On a twin-cooler engine the same reasoning applies to the second bank, so a sensor fault and a mechanically binding flap must be told apart with live data before parts are ordered. The bank 1 version is P2493; the actuator side of bank 2 is P248F.
P2498 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor1 to 4 hours
- Clears after repairAfter a drive cycle
Symptoms of P2498
- Check engine light on
- Measured and commanded bypass position differ on bank 2
Common causes of P2498
- Most likelyWorn bank 2 bypass valve with built-in sensor
- PossibleFlap binding so the sensor reads a position other than commanded
- Less likelyEnd-stop learn values invalid after a repair
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 P2498 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). |
| 98 | The exact fault in that area. |
What to do next
- Note P2498 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 P2498
What does P2498 mean?
P2498 means "EGR Cooler Bypass Position Sensor Range/Performance (Bank 2)". With P2498 the bank 2 bypass position signal is electrically valid but not believable, for example because it does not change when the flap is commanded, settles at an unexpected value or no longer matches the end stops learned earlier. It is a generic code, so it means the same on every make.
Is it safe to drive with P2498?
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 P2498 fail an emissions test?
Yes, it can. P2498 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 P2498 to fix?
Difficulty: medium. A typical repair takes 1 to 4 hours of work. This is a job for a workshop.
Will P2498 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.