Curing Ford P068A – The Real Fix for DCM3.5 ECU Power Faults

If you’ve diagnosed a Ford diesel vehicle and found fault code P068A, you’re likely also seeing P06A6, P06A7, or P06A8—all pointing to problems with reference voltages or the power relay circuit. These faults are increasingly common in Ford vehicles fitted with the DCM3.5 ECU, used across models like the Transit, Ranger, Fiesta, and Focus.

Although these codes suggest relay or sensor faults, they are typically caused by internal failure inside the ECU itself. At ECU Fix, we specialise in testing and repairing these ECUs—restoring full function without replacement.

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🔍 Ford P068A – What This Code Actually Means

Fault code P068A stands for:
“PCM Power Relay De-energised Too Early”

In simple terms, this code is triggered when the engine ECU (PCM) loses power too soon after the ignition is turned off. The ECU is supposed to stay powered briefly to complete shutdown procedures. If it shuts down prematurely, this code is logged—and sensor reference voltages may drop unexpectedly.

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⚠️ Related Fault Codes and What They Mean

When P068A is present, you’ll often also see:

• P06A6 – Sensor Reference Voltage A Malfunction
• P06A7 – Sensor Reference Voltage B Malfunction
• P06A8 – Sensor Reference Voltage C Malfunction

These indicate that one or more of the ECU’s internal reference voltage supplies are unstable or incorrect. While wiring and sensors should always be checked, the most common cause is ECU failure on the DCM3.5.

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🔧 Why the Ford DCM3.5 ECU Fails

This ECU is known to suffer from:

• Voltage regulation faults
• Corrupt shutdown logic
• Failed power relay drivers
• Internal PCB damage due to heat or vibration

As a result, the ECU either cuts out too early or fails to supply consistent sensor voltage, causing P068A and P06A6–P06A8 to appear repeatedly—even after replacing sensors or relays.

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🧪 Symptoms That Often Accompany P068A in Ford Vehicles

If you’re seeing Ford P068A, watch for these additional signs:

• Intermittent or failed engine starting
• Rough idle or limp mode
• Sensor voltage errors that come and go
• DTCs that return immediately after clearing
• Relay and wiring testing OK, but fault remains

These are all strong indicators that the ECU itself needs repair—not the relay or sensors.

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🛠 How ECU Fix Repairs Ford ECUs with P068A Fault

We offer a dedicated repair service for Ford DCM3.5 ECUs showing the P068A fault and related codes.

Our service includes:

• Full bench testing of power relay and sensor voltage circuits
• Component-level repair of failed voltage regulators or logic ICs
• Cleaning and testing of PCB and connectors
• Simulation of real-world ignition power-off behaviour
• Return of the ECU, fully restored and covered by a lifetime warranty

Once refitted, these ECUs typically require no programming—just clear the fault codes and test.

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🚗 Common Vehicles and Part Numbers – Examples Include, But Are Not Limited To

• Ford Transit 2.2 TDCi – 2012 to 2016
• Ford Ranger 2.2 / 3.2 TDCi – 2011 to 2016
• Ford Fiesta 1.5 TDCi – 2013 to 2017
• Ford Focus 1.6 / 2.0 TDCi – 2011 to 2018
• Ford Mondeo Mk4 / Mk5 – 2010 to 2017

If your ECU label includes DCM3.5, and you’re seeing these codes, your unit is a candidate for repair.

• BG9112A650FFE / BG9112A650FJD / DV4112A650BJ / AG9112A650ACF / BG9112A650PE / AG9112A650AFF / AG7112A650AC / BG9112A650FGB / BG9112A650SE / DV4112A650CG / AG9112A650AHG / BG9112A650RF / BG9112A650PC / AG4112A650CH / BG9112A650FHB / BG9112A650FHE / DV4112A650AG / BG9112A650PF / BG9112A650FHG / BG9112A650FFG / BG9112A650NF / AG9112A650ABF / BG9112A650FJF / AV4112A650CM / BV6112A650AFF / DV4112A650BE / AG9112A650ABG / BG9112A650SF / AG4112A650CF / AG9112A650ADF / BG9112A650SJ / BG9112A650FHD / DV4112A650BG / AG4112A650CG / BG9112A650FFD / DV4112A650CK / DV4112A650AK / DV4112A650BF / DV4112A650AJ / DV4112A650BK / DG9112A650AA / BV6112A650AFJ / BV6112A650ADE / BV6112A650ADK / BV6112A650ACK

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⚙️ Why Choose ECU Fix?

• ✅ Lifetime warranty on all repaired ECUs
• ✅ Fast turnaround—typically 24–48 hours
• ✅ UK-wide courier collection available
• ✅ In-house ECU repair specialists
• ✅ No fix, no fee – only pay collection & return shipping if unrepairable

We work with independent garages, fleet operators, and individual owners across the UK.

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📦 How to Book Your Ford ECU P068A Repair

1. Click “Shop Now” to start your booking
2. Choose courier collection or send the ECU to us
3. We test and repair the unit
4. Refit the ECU, clear codes, and confirm fault-free operation

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FAQs

How do I fix my P068A fault code?

To fix a P068A fault, first check the basics: battery voltage, fuses, and the PCM power relay. If these components are working correctly and you’re still seeing the code—especially alongside P06A6, P06A7, or P06A8—the most likely cause is internal ECU failure. On Ford vehicles with the DCM3.5 ECU, this fault is often resolved only by repairing or replacing the ECU itself.

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Can a bad battery cause a P068A code on a Ford?

Yes, a weak or failing battery can sometimes cause P068A to appear temporarily. This is because low voltage may interrupt the ECU’s shutdown procedure. However, if the code persists after replacing the battery or checking the power relay, the fault likely lies within the engine ECU (DCM3.5) and will require professional repair.

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What does ECM/PCM power relay de-energised performance too early mean?

This message means that the ECU lost power sooner than expected after the ignition was switched off. Normally, the ECU stays powered briefly to save data and shut down properly. If it cuts out too early—due to internal relay driver failure or voltage instability—it will log fault P068A.

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What is code P068A on Ford Transit?

In a Ford Transit, code P068A indicates the powertrain control module (PCM) shut down too early after ignition-off. While this can be caused by an external power relay, it is often the result of a failing DCM3.5 ECU, especially if the van also shows voltage reference codes (P06A6, P06A7, P06A8).