P049B
EGR B Flow Insufficient Detected
Same as P049A but specifically with measured flow below the required rate - typically EGR valve sticking closed or cooler heavily clogged.
Same as P049A but specifically with measured flow below the required rate - typically EGR valve sticking closed or cooler heavily clogged.
Common causes
- high
EGR valve B sticking closed
One of the most commonly reported causes for this code — check this first.
Typical part cost: $330-1650
- medium
EGR cooler B heavily clogged with soot
A plausible cause — test and verify before replacing parts.
Typical part cost: $330-1650
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First things to check
- 1Confirm the code with a scan tool and check for additional related codes.
- 2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.
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Related codes
See related trouble codes
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Frequently asked questions
What does P049B mean?
P049B means "EGR B Flow Insufficient Detected". It is a generic OBD-II code that points to a fault in the auxiliary emission controls.
What are the most common causes of P049B?
egr valve b sticking closed; egr cooler b heavily clogged with soot — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.
Can I keep driving with this code?
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.
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