Reductant Pressure Sensor High Input
Can I Drive?
Yes, But Fix Soon
DIY Difficulty
intermediate
Estimated Cost
$100-$400 line, $350-$900 doser
What does KUBOTA-P204D mean?
The KUBOTA-P204D (Kubota) diesel fault code means: Reductant Pressure Sensor High Input. This is a serious severity code.
Common Symptoms
- MIL on
Probable Causes (Ranked by Likelihood)
- Blocked DEF line downstream of pump Likely
- Frozen doser Possible
Step-by-Step Diagnostic Procedure
Inspect for kinked DEF line.
Warm system and re-test.
Frequently Asked Questions
What is Kubota code P204D?
Kubota P204D means: Reductant Pressure Sensor High Input. Serious code -- address promptly to avoid inducement / further damage.
Can I keep using my Kubota with P204D?
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 P204D cost to fix on a Kubota?
Repair cost range: $100-$400 line, $350-$900 doser. Compact-tractor labor is typically $110-$150/hr in 2026.