EGR Valve Stuck Open
The P2391 code means the vehicle's onboard diagnostic system has detected: EGR Valve Stuck Open. This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- moderate
- Estimated cost
- $150 - $450 (parts and labor)
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What Are the Symptoms of P2391?
- Check Engine Light on
- Rough idle and possible stalling
- Increased NOx emissions
- Engine may surge or run unevenly
- Reduced fuel economy
What Causes P2391? (Most Likely First)
- Carbon buildup holding EGR valve open Very High
- Faulty EGR valve with stuck plunger High
- Vacuum line leak keeping valve actuated Moderate
- EGR solenoid stuck in energized position Low
Can I Still Drive with P2391?
Short distances only. P2391 is rated moderate severity. Keep trips short and get it diagnosed soon rather than waiting for symptoms to worsen.
Frequently Asked Questions
What does P2391 mean?
P2391 indicates an EGR (Exhaust Gas Recirculation) system issue: EGR Valve Stuck Open. The EGR system reduces nitrogen oxide emissions by recirculating a portion of exhaust gas back into the intake.
Can I drive with P2391?
You can drive short distances. The engine may run rough or ping under load, and emissions will be higher than normal. Schedule a repair soon.
How much does it cost to fix P2391?
Most EGR repairs cost $150 to $450. Cleaning the valve may be sufficient ($100-$200), while a full replacement runs $200-$450.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose P2391?
-
Scan for P2391 and review freeze frame conditions
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Inspect EGR valve for carbon buildup and free movement
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Test EGR sensor B signal voltage and compare to specifications
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Check EGR passage and tube for blockage or restriction
Sources 1
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines the generic OBD-II code ranges)
Which Vehicles Commonly Get P2391?
- 2014-2022 Chevrolet Silverado 1500 6.2L V8
- 2012-2019 Toyota Camry 3.5L V6
- 2015-2023 Ford F-150 3.5L EcoBoost V6
- 2007-2015 Chevrolet Silverado 1500 5.3L V8
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