EGR Flow Rate High
The Engine Control Module (ECM) detects excessive flow through the EGR system.
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)
Your car is sending too much exhaust gas back into the engine when it shouldn't. This can mess with how the engine runs and can lead to higher emissions.
What the computer is actually seeing
The ECM monitors the EGR system for flow rates. It expects a certain range based on RPM and load; if it sees flow rates outside this range (like too high of a percentage), it triggers this code.
What a healthy reading looks like
Under normal conditions, EGR flow rates should be around 5-35% at idle, and less than 50% during acceleration. Anything above these values can trigger the code.
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. Inspect the EGR valve and ensure it is not stuck open. If it is, clean or replace the valve. Decision: Is the EGR valve functioning? Yes or No.
- 22. Check for blocked EGR passages. If any blockage is found, clean the passages. Decision: Are passages clear? Yes or No.
- 33. Inspect all related wiring and connectors for damage or corrosion. Repair any issues found. Decision: Are all connections good? Yes or No.
- 44. Perform a vacuum test on the EGR system to ensure proper function. Typical vacuum should reach around 15-20 inHg. Decision: Is the vacuum within range? Yes or No.
Common causes
- Faulty EGR valve
- Blocked EGR passages
- Vacuum leaks affecting EGR operation
- Wiring issues or poor connectors
- Excessive carbon buildup in the intake or manifold
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's not recommended to drive long distances due to possible high emissions and decreased efficiency.
Will this code come back after clearing?
If the underlying issue isn't fixed, the code will likely return.
Why does this code appear with other EGR codes?
EGR issues often affect multiple systems; they can be interconnected, leading to multiple codes.
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