EGR Insufficient Flow Detected
The BOBCAT-P0401 (Bobcat) diesel fault code means: EGR Insufficient Flow Detected. This is a moderate severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- intermediate
- Estimated cost
- $0-$800
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Common Symptoms
- Regen lamp blinking
- Slight power loss
Probable Causes (Ranked by Likelihood)
- Sooted EGR valve (short-duty skid-steer work) Very Likely
- Plugged EGR cooler Likely
- Failed EGR position sensor feedback Possible
Step-by-Step Diagnostic Procedure
Command EGR sweep in Service Analyzer, verify position feedback.
Remove valve and inspect for carbon packing -- clean with carb cleaner and soft brush.
Force parked regen when complete.
Frequently Asked Questions
What is Bobcat code P0401?
Bobcat P0401: EGR Insufficient Flow Detected. This code is reported on Bobcat equipment running the described engine family.
Can I keep working with Bobcat code P0401?
Usually drivable short-term, but fix soon to avoid derate or DPF issues.
How much does Bobcat P0401 cost to fix?
Typical repair cost: $0-$800. Off-road diesel shop labor runs $125-$175/hr in 2026. Dealer diagnostic software (Bobcat Service Analyzer) is usually required.
P0401 on Other Platforms
The same code ID appears across other engines, vehicles, and equipment. Diagnostic flow varies by platform — see the matching breakdown: