P0403Medium urgency
Exhaust Gas Recirculation Circuit
Emission · EGR System
⚠️ EGR is disabled. Causes emissions test failure and increased NOx. Service within 1–2 weeks.
What this means
The EGR valve solenoid control circuit has a fault — open circuit, short, or electrical failure preventing the ECU from controlling EGR flow.
Likely causes
- Failed EGR solenoidMost common
- Open or shorted EGR wiringCommon
- Corroded EGR connectorCommon
Estimated repair cost
EGR valve/solenoid$120 – $400
Wiring repair$80 – $250
🏪
Sponsored · Local Shop
Find shops near you specializing in this repair
Get quotes from certified mechanics · Free estimates
📦
Sponsored · Parts (Amazon affiliate)
Shop parts commonly used for this repair
Amazon search results for this code · prices and availability vary
Sponsored: MyOBDCode may earn compensation when you click partner links on this page.
Frequently asked questions about P0403
What does P0403 mean?
The EGR valve solenoid control circuit has a fault — open circuit, short, or electrical failure preventing the ECU from controlling EGR flow.
Is P0403 serious?
EGR is disabled. Causes emissions test failure and increased NOx. Service within 1–2 weeks.
How much does it cost to fix P0403?
Repair costs for P0403 range from $120 – $400 depending on the root cause and your vehicle.
Can I drive with P0403?
You can drive short distances but should have it repaired within 1–2 weeks to prevent further damage.