Reductant Tank Heater A Control Circuit Low
The KUBOTA-P20BA (Kubota) diesel fault code means: Reductant Tank Heater A Control Circuit Low. This is a moderate severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- intermediate
- Estimated cost
- $50-$200 wiring
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Common Symptoms
- MIL only
Probable Causes (Ranked by Likelihood)
- Short-to-ground on heater control Likely
Step-by-Step Diagnostic Procedure
Disconnect heater; if code clears, short is in the wire.
Frequently Asked Questions
What is Kubota code P20BA?
Kubota P20BA means: Reductant Tank Heater A Control Circuit Low. Moderate code -- address promptly to avoid inducement / further damage.
Can I keep using my Kubota with P20BA?
Moderate fault -- you can usually finish the job but plan repair soon. Use Kubota Diagmaster software (dealer tool) for full diagnostics.
How much does P20BA cost to fix on a Kubota?
Repair cost range: $50-$200 wiring. Compact-tractor labor is typically $110-$150/hr in 2026.
P20BA on Other Platforms
The same code ID appears across other engines, vehicles, and equipment. Diagnostic flow varies by platform — see the matching breakdown: