HINO-P0405 moderate Hino ›

Exhaust Gas Recirculation Sensor "A" Circuit Low

The HINO-P0405 (Hino) diesel fault code means: Exhaust Gas Recirculation Sensor "A" Circuit Low. 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-P0405?

  • Check Engine light
  • EGR may be disabled

What Causes HINO-P0405? (Most Likely First)

  • Sensor signal wire open or shorted to ground High
  • Failed EGR sensor High
  • Loss of the 5-volt sensor reference Medium

Can I Still Drive with HINO-P0405?

Short distances only. HINO-P0405 is rated moderate severity. Keep trips short and get it diagnosed soon rather than waiting for symptoms to worsen.

Frequently Asked Questions

What does P0405 mean on a Hino?

P0405 means Exhaust Gas Recirculation Sensor "A" Circuit Low. The EGR sensor "A" signal is below the range the control module expects.

Is P0405 a Hino-specific code?

No. P0405 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-P0405?

  1. Check the sensor reading on a scan tool.

  2. Check for 5-volt reference and ground at the sensor connector.

  3. Inspect the connector and harness.

Sources 3

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

P0405 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 P0405 Duramax moderate Exhaust Gas Recirculation Sensor "A" Circuit Low Isuzu moderate Exhaust Gas Recirculation Sensor "A" Circuit Low Kubota moderate EGR Sensor A Circuit Low Power Stroke moderate Exhaust Gas Recirculation Sensor "A" Circuit Low

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