Exhaust Gas Recirculation Control Circuit Range/Performance
The POWERSTROKE-P0404 (Power Stroke) diesel fault code means: Exhaust Gas Recirculation Control Circuit Range/Performance. This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- intermediate
- Estimated cost
- $200-$700
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Common Symptoms
- CEL
- Rough idle
- Hesitation
- Limp mode
Probable Causes (Ranked by Likelihood)
- Carbon-seized EGR valve Very Likely
- Failed EGR position feedback Likely
- PCM driver issue (rare) Less Likely
Step-by-Step Diagnostic Procedure
Clean EGR valve off the engine -- if it doesn't actuate smoothly by hand after cleaning, replace.
Clean or replace EGR cooler at the same time.
Frequently Asked Questions
What is P0404 on a 6.0L Power Stroke?
P0404 on a 6.0L Power Stroke (2003-2007) indicates: Exhaust Gas Recirculation Control Circuit Range/Performance. This is a known diagnostic trouble code on this engine family and typically points to the causes listed above.
Can I drive with P0404 on my Power Stroke?
Only drive short distances to get to a repair facility. Continued operation may cause further damage.
How much does it cost to fix P0404?
Repair cost is typically $200-$700 depending on the underlying cause and whether you DIY or use a shop. Diagnostic time alone runs $100-$180 at most independent diesel shops.
P0404 on Other Platforms
The same code ID appears across other engines, vehicles, and equipment. Diagnostic flow varies by platform — see the matching breakdown: