POWERSTROKE-P0612 serious Power Stroke ›

FICM Relay Control Circuit

The POWERSTROKE-P0612 (Power Stroke) diesel fault code means: FICM Relay Control Circuit. This is a serious severity code.

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Keep driving?
No — stop driving
DIY difficulty
intermediate
Estimated cost
$50-$400
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Common Symptoms

  • No start
  • Intermittent start
  • CEL

Probable Causes (Ranked by Likelihood)

  • Failed FICM relay Likely
  • Open wiring in relay control circuit Likely
  • PCM driver failure Possible

Frequently Asked Questions

What is P0612 on a 6.0L Power Stroke?

P0612 on a 6.0L Power Stroke (2003-2007) indicates: FICM Relay Control Circuit. This is a known diagnostic trouble code on this engine family and typically points to the causes listed above.

Can I drive with P0612 on my Power Stroke?

No. Stop driving and arrange for towing. Continued operation risks serious engine or emissions system damage.

How much does it cost to fix P0612?

Repair cost is typically $50-$400 depending on the underlying cause and whether you DIY or use a shop. Diagnostic time alone runs $100-$180 at most independent diesel shops.

Mechanics Guide Step-by-step diagnosis

Step-by-Step Diagnostic Procedure

  1. Swap FICM relay with known good.

  2. Check wiring between PCM and relay.

Sources 1

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

  • SAE J2012Diagnostic Trouble Code Definitions (defines P0612 as a generic OBD-II code)

P0612 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 P0612

Commonly Affected Vehicles

  • 2003-2007 Ford F-250 Super Duty 6.0L Power Stroke
  • 2003-2007 Ford F-350 Super Duty 6.0L Power Stroke
  • 2003-2007 Ford F-450/F-550 Super Duty 6.0L Power Stroke
  • 2003-2010 Ford E-350/E-450 6.0L Power Stroke
  • 2003-2005 Ford Excursion 6.0L Power Stroke

Related Codes

P2614P0611

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

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