Reductant Pressure Sensor Range/Performance
Can I Drive?
Yes, But Fix Soon
DIY Difficulty
advanced
Estimated Cost
$600-$1,800 module
What does KUBOTA-P204B mean?
The KUBOTA-P204B (Kubota) diesel fault code means: Reductant Pressure Sensor Range/Performance. This is a serious severity code.
Common Symptoms
- Derate
- Inducement
Probable Causes (Ranked by Likelihood)
- Sensor drift Likely
Step-by-Step Diagnostic Procedure
Compare commanded vs actual DEF pressure in Diagmaster.
Frequently Asked Questions
What is Kubota code P204B?
Kubota P204B means: Reductant Pressure Sensor Range/Performance. Serious code -- address promptly to avoid inducement / further damage.
Can I keep using my Kubota with P204B?
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 P204B cost to fix on a Kubota?
Repair cost range: $600-$1,800 module. Compact-tractor labor is typically $110-$150/hr in 2026.