OBD-II code · Powertrain (generic)
P049C EGR B Flow Excessive Detected
Same as P049A but with measured flow above the required rate - typically EGR valve sticking open or position sensor offset low.
Is it safe to drive with P049C?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyEGR valve B sticking open
- PossiblePosition sensor reads low
Symptoms
- Check engine light on
- Pinging or knocking under load
- Power loss and hesitation
- Possible rough idle
- Failed emissions inspection (NOx)
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1.5–5 h
- Emissions test
- Likely to fail
- Parts involved
- Egr Valve B, Egr Position Sensor B
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.