EGR Valve Stuck Open
The PERKINS-P042E (Perkins) 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
What Are the Symptoms of PERKINS-P042E?
- Rough idle
- White smoke
What Causes PERKINS-P042E? (Most Likely First)
- Carbon on seat (common on 1104D industrial light-idle) Very Likely
Can I Still Drive with PERKINS-P042E?
Yes, with caution. PERKINS-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 Perkins fault code P042E?
Perkins P042E means: EGR Valve Stuck Open. Serious code -- address promptly to avoid inducement / further damage.
Can I keep operating with Perkins P042E?
Serious fault -- you can move the machine to a shop but don't run it under load. Diagnose with Perkins EST / CAT ET (kin to CAT-badged machines).
How much does it cost to fix Perkins P042E?
Repair cost range: $60-$160 cleaning.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose PERKINS-P042E?
Remove and clean EGR valve.
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 PERKINS-P042E?
- CAT and JCB compact wheel loaders with Perkins 854E
- CAT 244D / 246D / 262D skid steers (Perkins-derived)
- JCB 3CX / 4CX backhoes with 1104D / 1204E
- Manitou telehandlers with Perkins 1104D / 1204E
- Perkins 2506 / 2806 industrial gensets
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