POWERSTROKE-P0546 moderate Power Stroke ›

Exhaust Gas Temperature Sensor Circuit High (Bank 1 Sensor 1)

The POWERSTROKE-P0546 (Power Stroke) diesel fault code means: Exhaust Gas Temperature Sensor Circuit High (Bank 1 Sensor 1). 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 POWERSTROKE-P0546?

  • Check Engine Light on
  • Possible reduced power or rough running
  • Possible hard starting

What Causes POWERSTROKE-P0546? (Most Likely First)

  • Open signal or ground wire, or an unplugged connector High
  • Failed sensor High
  • Signal wire shorted to reference voltage Moderate
  • Engine computer input fault Low

Can I Still Drive with POWERSTROKE-P0546?

Short distances only. POWERSTROKE-P0546 is rated moderate severity. Keep trips short and get it diagnosed soon rather than waiting for symptoms to worsen.

Frequently Asked Questions

What does P0546 mean on a Power Stroke?

P0546 means Exhaust Gas Temperature Sensor Circuit High (Bank 1 Sensor 1). The exhaust gas temperature sensor signal is above its normal range, which usually points to an open circuit or a short to voltage.

Is P0546 a Power Stroke-specific code?

No. P0546 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 Ford uses to set it on its diesels are in Ford service information.

Mechanics Guide Step-by-step diagnosis

How Do You Diagnose POWERSTROKE-P0546?

  1. Inspect the exhaust gas temperature sensor connector and harness.

  2. Check the exhaust gas temperature sensor reference voltage, ground and signal against the service specification.

  3. Check for other codes that share the same sensor reference voltage or ground.

Sources 1

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

  • SAE J2012Diagnostic Trouble Code Definitions (defines P0546 as a generic OBD-II code)

P0546 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 P0546 Duramax moderate Exhaust Gas Temperature Sensor Circuit High (Bank 1 Sensor 1)

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