P0404Severity: Low
P0404 – EGR Range/Performance
The EGR system isn't operating in the expected range.
What it means
The EGR valve's position/flow doesn't match the expected value. Fouling, a valve fault or a position sensor issue can be the cause.
Symptoms
- Rough idle
- Loss of power
- Check-engine light
- Higher emissions
Common causes
- Dirty/clogged EGR valve
- Faulty position sensor
- Wiring/connector issue
- Carbon buildup
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Frequently asked questions
What does trouble code P0404 mean?
P0404 – EGR Range/Performance. The EGR valve's position/flow doesn't match the expected value. Fouling, a valve fault or a position sensor issue can be the cause.
Can I drive with a P0404 code?
It's usually not urgent, but finding and fixing the cause matters for emissions and fuel economy.