EGR Valve Stuck Open
The KUBOTA-P042E (Kubota) diesel fault code means: EGR Valve Stuck Open. This is a serious severity code.
- Keep driving?
- Yes, with caution
- DIY difficulty
- intermediate
- Estimated cost
- $60-$160 cleaning, $650-$1,400 EGR valve
What Are the Symptoms of KUBOTA-P042E?
- Rough idle
- White / gray smoke
- Hard start warm
What Causes KUBOTA-P042E? (Most Likely First)
- Carbon holding EGR flapper partially open Very Likely
- Failed EGR actuator motor Likely
Can I Still Drive with KUBOTA-P042E?
Yes, with caution. KUBOTA-P042E is rated serious severity. Keep trips short and get it diagnosed soon rather than waiting for symptoms to worsen.
Frequently Asked Questions
What is Kubota code P042E?
Kubota P042E means: EGR Valve Stuck Open. Serious code -- address promptly to avoid inducement / further damage.
Can I keep using my Kubota with P042E?
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 P042E cost to fix on a Kubota?
Repair cost range: $60-$160 cleaning, $650-$1,400 EGR valve. Compact-tractor labor is typically $110-$150/hr in 2026.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose KUBOTA-P042E?
Remove and clean; confirm closed-at-rest with Diagmaster sweep test.
Sources 1
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines P042E as a generic OBD-II code)
P042E 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-P042E?
- Kubota BX1880 / BX2380 / BX23S sub-compact tractors
- Kubota L2501 / L3301 / L3901 utility tractors
- Kubota L4060 / L4760 / L5060 / L5460 grand L tractors
- Kubota M5-091 / M5-111 utility tractors
- Kubota M6S-111 / M7060 / M7-132 / M7-152 tractors
- Kubota MX5400 / MX6000 utility tractors
- Kubota SVL65-2 / SVL75-2 / SVL95-2s skid steer loaders
- Kubota SSV65 / SSV75 skid steer loaders
- Kubota RTV-X1100C / RTV-X1140 / RTV1140CPX utility vehicles
- Kubota generator sets (GL, GR, SQ series)
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