Throttle/Pedal Position Sensor A Circuit High
The KUBOTA-P0123 (Kubota) diesel fault code means: Throttle/Pedal Position Sensor A Circuit High. This is a serious severity code.
- Keep driving?
- Limp mode only
- DIY difficulty
- intermediate
- Estimated cost
- $120-$300 pedal
What Are the Symptoms of KUBOTA-P0123?
- Machine defaults to idle
- MIL on
What Causes KUBOTA-P0123? (Most Likely First)
- Signal wire shorted to 5V Likely
- Failed pedal Possible
Can I Still Drive with KUBOTA-P0123?
Limp mode only. KUBOTA-P0123 is rated serious severity. Continuing to drive in this state risks further damage — get it looked at before your next trip.
Frequently Asked Questions
What is Kubota code P0123?
Kubota P0123 means: Throttle/Pedal Position Sensor A Circuit High. Serious code -- address promptly to avoid inducement / further damage.
Can I keep using my Kubota with P0123?
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 P0123 cost to fix on a Kubota?
Repair cost range: $120-$300 pedal. Compact-tractor labor is typically $110-$150/hr in 2026.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose KUBOTA-P0123?
Disconnect pedal; if signal drops to 0V, harness is OK -- pedal bad.
Inspect for wire chafe at cab pivot.
Sources 1
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines P0123 as a generic OBD-II code)
P0123 on Other Platforms
The same code ID appears across other engines, vehicles, and equipment. Diagnostic flow varies by platform — see the matching breakdown:
Which Vehicles Commonly Get KUBOTA-P0123?
- Kubota M4-071 / M4-072 utility tractors
- Kubota M5-091 / M5-111 utility tractors
- Kubota M6S-111 tractors
- Kubota M7-132 / M7-152 / M7-172 premium tractors
- Kubota MX4800 / MX5400 / MX5800 / MX6000 utility tractors
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