P049E code meaning
EGR B Control Position Exceeded Learning Limit
Powertrain system Generic code P04xx codes Check engine light
What P049E means
Exhaust gas recirculation (EGR) routes part of the exhaust back into the intake to lower combustion temperature and NOx. Circuit B is the second EGR path; on diesels with two circuits it is the low-pressure EGR, which takes exhaust after the particulate filter and feeds it in before the turbo compressor (GM diesels 2016–18, FCA's 2.2 and 3.0 diesels). P049E is the counterpart of P049D for valve B: the learned zero point of its position sensor lies outside the permitted window. GM lists it only in a fault group of its low-pressure EGR (whose position sensor is sensor C there, P044C/P044D), and in the 2016 calibration it is explicitly disabled; thresholds are not published. The description therefore follows GM's P049D strategy by analogy. Low-pressure EGR position control is then switched off.
P049E at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyHard
- Typical labor0.5 to 4 hours
- Clears after repairAfter a drive cycle
Symptoms of P049E
- Check engine light on
- EGR switched off, usually no noticeable change
- Higher NOx
Common causes of P049E
- Most likelyLow-pressure EGR valve sooted, does not close fully
- PossiblePosition sensor of the low-pressure valve faulty or shifted
- PossibleValve replaced without teaching in
- Less likelyHarness or connector of the low-pressure valve
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Low pressure EGR valveEGR valve b position sensorEngine control module
What each part of P049E means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 4 | Area: auxiliary emission controls (catalytic converter, EGR, EVAP). |
| 9E | The exact fault in that area. |
What to do next
- Note P049E 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 P049E
What does P049E mean?
P049E means "EGR B Control Position Exceeded Learning Limit". Exhaust gas recirculation (EGR) routes part of the exhaust back into the intake to lower combustion temperature and NOx. It is a generic code, so it means the same on every make.
Is it safe to drive with P049E?
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 P049E fail an emissions test?
Yes, it can. P049E 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 P049E to fix?
Difficulty: hard. A typical repair takes 0.5 to 4 hours of work. This is a job for a workshop.
Will P049E 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.