EGR Position Range/Performance
The KUBOTA-P0404 (Kubota) diesel fault code means: EGR Position Range/Performance. This is a serious severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- intermediate
- Estimated cost
- $0 DIY clean, $350-$900 replacement
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Common Symptoms
- Derate
- Elevated soot or NOx
Probable Causes (Ranked by Likelihood)
- Carbon-seized EGR valve (short-cycle mowing/loader work) Very Likely
- Position feedback sensor drift Possible
Step-by-Step Diagnostic Procedure
Command EGR in Diagmaster and watch position.
Remove and clean valve with carbon solvent.
Frequently Asked Questions
What is Kubota code P0404?
Kubota P0404 means: EGR Position Range/Performance. Serious code -- address promptly to avoid inducement / further damage.
Can I keep using my Kubota with P0404?
Serious fault -- you can move the machine to a shop but don't run it under load. Use Kubota Diagmaster software (dealer tool) for full diagnostics.
How much does P0404 cost to fix on a Kubota?
Repair cost range: $0 DIY clean, $350-$900 replacement. Compact-tractor labor is typically $110-$150/hr in 2026.
P0404 on Other Platforms
The same code ID appears across other engines, vehicles, and equipment. Diagnostic flow varies by platform — see the matching breakdown: