HINO-P0404 moderate Hino ›

Exhaust Gas Recirculation Control Circuit Range/Performance

The HINO-P0404 (Hino) diesel fault code means: Exhaust Gas Recirculation Control Circuit Range/Performance. This is a moderate severity code.

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Keep driving?
Short distances only
DIY difficulty
intermediate
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What Are the Symptoms of HINO-P0404?

  • Check Engine light
  • Possible reduced power

What Causes HINO-P0404? (Most Likely First)

  • EGR valve sticking from soot build-up High
  • EGR position sensor fault Medium
  • Actuator wearing out or high resistance in the circuit Medium

Can I Still Drive with HINO-P0404?

Short distances only. HINO-P0404 is rated moderate severity. Keep trips short and get it diagnosed soon rather than waiting for symptoms to worsen.

Frequently Asked Questions

What does P0404 mean on a Hino?

P0404 means Exhaust Gas Recirculation Control Circuit Range/Performance. The EGR valve is not reaching the position the control module commands.

Is P0404 a Hino-specific code?

No. P0404 is a generic OBD-II code defined by SAE J2012, so it means the same thing on any vehicle that sets it. The exact conditions Hino uses to set it on its diesels are in Hino service information.

Mechanics Guide Step-by-step diagnosis

How Do You Diagnose HINO-P0404?

  1. Compare commanded and actual EGR position on a scan tool through the valve's range.

  2. Inspect and clean the valve if soot is restricting it.

  3. Check the circuit for high resistance.

Sources 3

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

P0404 on Other Platforms

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

Gas / Automotive (OBD-II) Generic OBD-II definition for P0404 Duramax moderate Exhaust Gas Recirculation Control Circuit Range/Performance Isuzu moderate Exhaust Gas Recirculation Control Circuit Range/Performance Kubota serious EGR Position Range/Performance Power Stroke moderate Exhaust Gas Recirculation Control Circuit Range/Performance

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