What are the common causes of P04DA?

EGR valve stuck open flowing too much. A carboned EGR valve that will not seat. A leaking EGR cooler feeding extra flow. A stuck EGR actuator holding the valve open. A dirty MAF overstating airflow and pulling EGR open.

Read EGR flow live data and confirm excessive flow. Inspect the EGR valve for carbon holding it open. Command EGR closed and check that flow drops. Check the EGR cooler for internal leaks. Clean or replace the MAF if it reads high. Clear the code and retest.

P04DA

Closed Loop EGR Control At Limit - Flow Too High

System: Auxiliary emission controls (P code)
Lamp: Check Engine Light
Category: Powertrain - Auxiliary Emissions Controls

What it means

P04DA means Closed Loop EGR Control At Limit - Flow Too High.

Check these first

EGR valve stuck open flowing too much
A carboned EGR valve that will not seat
A leaking EGR cooler feeding extra flow
A stuck EGR actuator holding the valve open
A dirty MAF overstating airflow and pulling EGR open

What to do next

Read EGR flow live data and confirm excessive flow
Inspect the EGR valve for carbon holding it open
Command EGR closed and check that flow drops
Check the EGR cooler for internal leaks
Clean or replace the MAF if it reads high
Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.