Exhaust Gas Recirculation (EGR) Valve Position - Above High Threshold
The EGR valve position is reading higher than the expected maximum value.
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What it means (plain English)
The computer checks the EGR valve position and sees it's open too much, which can cause problems with emissions and engine performance.
What the computer is actually seeing
The engine control module (ECM) sees the EGR valve position sensor output is above its programmed limit, typically over 2.5 volts when it should be below that for proper operation.
What a healthy reading looks like
EGR valve position sensor should read between 0.5 to 2.0 volts for proper function.
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 the EGR valve wiring and connector for damage or corrosion. If found, repair or replace as necessary. Decision Point: Is wiring/connector good? Yes - go to step 2; No - fix and retest.
- 22. Measure the voltage at the EGR valve position sensor. It should be between 0.5 to 2.0 volts when the engine is running. Decision Point: Is voltage in the expected range? Yes - go to step 3; No - replace the EGR valve position sensor and retest.
- 33. Manually inspect the EGR valve operation. With the engine running, can you see the valve moving properly when commanded? Decision Point: Is valve operating correctly? Yes - the EGR valve may be faulty; replace it; No - inspect for carbon buildup and clean as necessary before retest.
Common causes
- Faulty EGR valve
- Incorrect EGR valve position sensor reading
- Wiring issues or bad connections in EGR system
- Carbon buildup in the EGR valve or passages
Typical repair cost
$$
Related codes
Frequently asked questions
Can I drive with this code active?
It's drivable but not recommended; clean-up emissions could be affected, leading to potential failures during emissions testing.
Will this code come back after clearing?
If the underlying issue isn't resolved, yes, it will likely return.
Why is this related to other codes?
EGR issues often cause multiple faults since they affect exhaust flow and emissions.
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