Exhaust Gas Recirculation Control Circuit Low
The P0489 code means the vehicle's onboard diagnostic system has detected: Exhaust Gas Recirculation Control Circuit Low. This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- moderate
- Estimated cost
- $100 - $450 (parts and labor)
Best-selling code reader on Amazon. Reads and clears check engine codes on any 1996+ vehicle. Under $30.
Essential for diagnosing sensor codes, checking voltage, and testing circuits. Under $15 and pays for itself on the first job.
Affiliate links — we earn a commission at no extra cost to you.
Common Symptoms
- Check Engine Light on
- EGR system inoperative
- Rough idle
- Increased NOx emissions
Probable Causes (Ranked by Likelihood)
- Short to ground in EGR control circuit wiring Very High
- Failed EGR solenoid with internal short High
- Corroded EGR valve connector Moderate
- ECM driver circuit failure for EGR Low
Frequently Asked Questions
What does circuit low mean for P0489?
Circuit low means the ECM detects voltage on the EGR control circuit that is below the minimum threshold. This usually indicates a short to ground in the wiring or a solenoid that has developed an internal short.
Can I drive with the EGR system not working?
You can drive short distances, but the vehicle will have increased NOx emissions and may run rough at idle. The Check Engine Light will remain on and the vehicle will fail emissions testing.
Is the EGR valve expensive to replace?
EGR valves typically cost $100 to $300 for the part. Labor adds another $100 to $200. However, if the issue is just wiring, the repair cost can be significantly less.
Mechanics Guide Step-by-step diagnosis
Step-by-Step Diagnostic Procedure
-
Disconnect the EGR valve connector and check for a short to ground on the control wire
-
Measure EGR solenoid resistance; a very low reading indicates an internal short
-
Inspect the EGR valve connector and wiring harness for damage, especially near hot exhaust components
-
Verify ECM output voltage on the EGR control circuit with the valve disconnected
Sources 2
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)
- Cross-checked against the SAE J2012:2002 DTC table (2026-08-27)archived scan of the SAE standard — readable copy, not SAE’s current edition
P0489 on Diesel, EV & Equipment
The same code ID appears across other engines and platforms. The diagnostic flow varies by manufacturer — these are the platform-specific breakdowns:
Commonly Affected Vehicles
- 2008-2018 Honda Accord
- 2010-2020 Toyota Camry
- 2009-2019 Nissan Altima
- 2011-2020 Hyundai Sonata
Related Codes
Explore More
Was this helpful?
Send this to whoever is fixing the car — your mechanic, or the person asking what the light means.