POWERSTROKE-P0198 moderate Power Stroke ›

Engine Oil Temperature Sensor High

The POWERSTROKE-P0198 (Power Stroke) diesel fault code means: Engine Oil Temperature Sensor High. This is a moderate severity code.

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Keep driving?
Yes, but fix soon
DIY difficulty
beginner
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What Are the Symptoms of POWERSTROKE-P0198?

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

What Causes POWERSTROKE-P0198? (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-P0198?

Yes, but fix soon. POWERSTROKE-P0198 is rated moderate severity. It is not an immediate stop-driving fault, but it will not clear itself — book the repair rather than ignoring it.

Frequently Asked Questions

What does P0198 mean on a Power Stroke?

P0198 means Engine Oil Temperature Sensor High. The engine oil temperature sensor signal is above its normal range, which usually points to an open circuit or a short to voltage.

Is P0198 a Power Stroke-specific code?

No. P0198 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-P0198?

  1. Inspect the engine oil temperature sensor connector and harness.

  2. Check the engine oil 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 P0198 as a generic OBD-II code)

P0198 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 P0198

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More Power Stroke codes → Diesel home All diesel codes Heavy-duty Guides

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