BOBCAT-P20E8 serious Bobcat ›

Reductant Pressure Too Low

The BOBCAT-P20E8 (Bobcat) diesel fault code means: Reductant Pressure Too Low. This is a serious severity code.

Unverified. We could not confirm this code's definition against freely available manufacturer documentation, so treat the meaning, severity and fix guidance on this page as unconfirmed. Check it against the manufacturer's service information for your exact model and serial range before acting on it. This page is kept out of search engines for that reason, and we are working through this family manual by manual.

My Garage →
Keep driving?
Limited driving only
DIY difficulty
advanced
Estimated cost
$500-$1,800

What Are the Symptoms of BOBCAT-P20E8?

  • DEF dosing fault / lamp on
  • Derate active or pending

What Causes BOBCAT-P20E8? (Most Likely First)

  • Failed DEF supply module (pump) Likely
  • Frozen / crystallized DEF in supply line Possible
  • DEF filter restricted Possible

Can I Still Drive with BOBCAT-P20E8?

Limited driving only. BOBCAT-P20E8 is rated serious severity. Keep trips short and get it diagnosed soon rather than waiting for symptoms to worsen.

Frequently Asked Questions

What is Bobcat code P20E8?

Bobcat P20E8: Reductant Pressure Too Low. This code is reported on Bobcat equipment running the described engine family.

Can I keep working with Bobcat code P20E8?

Limited operation only -- finish the current task then shut down for repair.

How much does Bobcat P20E8 cost to fix?

Estimated repair cost: $500-$1,800. Off-road diesel shop labor runs $125-$175/hr in 2026. Dealer diagnostic software (Bobcat Service Analyzer) is usually required.

Mechanics Guide Step-by-step diagnosis

How Do You Diagnose BOBCAT-P20E8?

  1. Scan DEF pressure during purge cycle.

  2. Inspect DEF heater circuit fuse and relay.

  3. Replace DEF supply module if pressure cannot build.

Sources 1

This page is built from documented references. Verify against your own service info before repair work.

  • SAE J2012Diagnostic Trouble Code Definitions (defines P20E8 as a generic OBD-II code)

P20E8 on Other Platforms

The same code ID appears across other engines, vehicles, and equipment. Diagnostic flow varies by platform — see the matching breakdown:

Hino serious Suction Line Pressure Build Up Check Isuzu serious Reductant Pressure Too Low Kubota serious Reductant Pressure Too Low PACCAR serious PACCAR MX fault code P20E8 — definition not reliably documented Yanmar serious Reductant Pressure Too Low

Which Vehicles Commonly Get BOBCAT-P20E8?

  • Bobcat S650 skid steer loader (Kubota V3800)
  • Bobcat S740 / S750 / S770 / S850 skid steer loaders (Kubota V3800)
  • Bobcat T650 / T750 / T770 / T870 compact track loaders (Kubota V3800)
  • Bobcat E50 / E55 / E60 / E85 mini excavators (Kubota V3800)
  • Bobcat UW56 utility vehicle (Kubota V3800)

Explore More

More Bobcat codes → Diesel home All diesel codes Heavy-duty Guides

Was this helpful?

Send this to whoever is fixing the truck — your tech, or the person asking what the fault means.