POWERSTROKE-P0271 serious Power Stroke ›

Cylinder 4 Injector Circuit High

The POWERSTROKE-P0271 (Power Stroke) diesel fault code means: Cylinder 4 Injector Circuit High. This is a serious severity code.

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Keep driving?
Short distances only
DIY difficulty
advanced
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What Are the Symptoms of POWERSTROKE-P0271?

  • Check Engine Light on
  • Rough running or misfire
  • Reduced power

What Causes POWERSTROKE-P0271? (Most Likely First)

  • Open injector wire or unplugged connector High
  • Injector wire shorted to voltage Moderate
  • Failed injector coil Moderate
  • Injector driver fault in the control module Low

Can I Still Drive with POWERSTROKE-P0271?

Short distances only. POWERSTROKE-P0271 is rated serious severity. Keep trips short and get it diagnosed soon rather than waiting for symptoms to worsen.

Frequently Asked Questions

What does P0271 mean on a Power Stroke?

P0271 means Cylinder 4 Injector Circuit High. The voltage on the cylinder 4 injector circuit is higher than expected, which usually points to an open circuit or a short to voltage.

Is P0271 a Power Stroke-specific code?

No. P0271 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-P0271?

  1. Inspect the cylinder 4 injector harness and connector.

  2. Measure the injector coil resistance and compare it with the specification.

  3. Check the circuit for an open and for a short to voltage.

Sources 1

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

  • SAE J2012Diagnostic Trouble Code Definitions (defines P0271 as a generic OBD-II code)

P0271 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 P0271

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

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