Exhaust Gas Recirculation (EGR) Flow
EGR flow is outside the expected range during engine operation.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The computer checks how much exhaust gas is being recirculated back into the intake to reduce emissions. If it sees too little or too much flow, it throws this code.
What the computer is actually seeing
The Engine Control Unit (ECU) monitors the EGR flow electronically via a sensor, and expects a specific flow rate within set parameters depending on engine load and RPM.
What a healthy reading looks like
Expected EGR flow varies by engine but typically should be between 5-15% of the total engine airflow under load conditions.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 11. Check EGR valve appearance and operation. Ensure it's not stuck or clogged. If it doesn’t open when commanded, it might be bad.
- 22. Inspect EGR flow sensor wiring and connector; look for signs of damage or corrosion. Repair as needed.
- 33. Clear the code and run the engine to monitor EGR performance with a scan tool. Check actual flow versus desired flow values.
- 44. If the EGR valve appears fine and connections are good, test the EGR flow sensor with a multimeter; should read according to manufacturer specs.
Common causes
- Clogged EGR valve or passage
- Faulty EGR flow sensor
- Vacuum leaks affecting EGR operation
- Wiring issues or connector problems to the EGR system
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Driving with this code can cause increased emissions and reduced efficiency; it's better to fix it soon.
Will the code come back after clearing it?
If the underlying issue isn't fixed, the code will typically return after a short drive cycle.
Why does this code pair with other EGR-related codes?
Multiple EGR-related codes can indicate a broader problem in the exhaust gas recirculation system.
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