Exhaust Gas Recirculation Sensor B Circuit High
The P2389 code means the vehicle's onboard diagnostic system has detected: Exhaust Gas Recirculation Sensor B Circuit High. 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 P2389?
- Check Engine Light on
- Rough idle or engine hesitation
- Increased NOx emissions
- Engine pinging or knocking under load
- Reduced fuel economy
What Causes P2389? (Most Likely First)
- Short to voltage in EGR sensor B circuit Very High
- Failed EGR position sensor High
- Wiring harness damage Moderate
- PCM internal fault Low
Can I Still Drive with P2389?
Short distances only. P2389 is rated moderate severity. Keep trips short and get it diagnosed soon rather than waiting for symptoms to worsen.
Frequently Asked Questions
What does P2389 mean?
P2389 indicates an EGR (Exhaust Gas Recirculation) system issue: Exhaust Gas Recirculation Sensor B Circuit High. The EGR system reduces nitrogen oxide emissions by recirculating a portion of exhaust gas back into the intake.
Can I drive with P2389?
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 P2389?
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 P2389?
-
Scan for P2389 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 P2389?
- 2007-2015 Chevrolet Silverado 1500 5.3L V8
- 2009-2017 Toyota Camry 2.5L I4
- 2015-2023 Ford F-150 5.0L V8
- 2012-2019 Honda Accord 1.5L Turbo I4
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