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)
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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
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
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.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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:
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