Ford Focus and C-Max not starting due to engine ECU fault.

Engine ECU Ford Focus and CMax

Common non-starting problem for Ford Focus (Mk III) and Ford C-Max (Mk II) vehicle ranges fitted with this Delphi engine ECU.


Intermittent cutting out and failure to restart symptoms can be a sure sign that this engine ECU is developing an internal malfunction, over time this will lead to a permanent no start problem for the Ford Focus and C-Max range.


Having the engine management light illuminated or ‘Engine Malfunction’ message on dash may lead you to have the vehicle scanned diagnostically. A myriad of fault codes may be found for sensor reference voltages, power relay and processor faults. Often when the fault worsens into a permanent no-start issue you will find that communications to the engine management system is not possible.


You may have been told that you now need an expensive new replacement engine ECU, however this will also require coding to the vehicle at an extra expense.

We have a more cost-effective solution to end Ford Focus and C-Max not starting problems – a comprehensive test and rebuild service of your original ECU without the need for re-coding, for a fraction of the cost of buying new.

Our in-house R&D team have identified that these Delphi DCM3.5 engine ECUs all suffer from manufacturing defects and have developed a solution to get you back on the road as quickly as possible with a turnaround of 2-3 working days, complete with an unlimited mile Lifetime Warranty for your piece of mind.


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Common Failure symptoms:

(Symptoms may be intermittent or permanent)

  • Cutting out
  • Not running / none start
  • Engine management light (EML) illuminated
  • ‘Engine Malfunction’ message on dash
  • Will not crank
  • No communication to ECU

Common fault codes:

  • P0194 – Fuel Pressure Sensor Intermittent
  • P068A – ECM/PCM Power Relay De-Energised – Too Early
  • U0100 – Lost Communication With PCM
  • U0401 – Invalid Data From PCM
  • P0606 – PCM Processor
  • P060C – PCM Processor Performance
  • P0194 – Rail Pressure Sensor Malfunction
  • P0072 – Ambient Air Pressure Sensor Signal Too Low
  • P06A6 – Sensor Reference Voltage A Malfunction
  • P06A7 – Sensor Reference Voltage B Malfunction
  • P06A8 – Sensor Reference Voltage C Malfunction
  • P2452 – Exhaust Gas Differential Pressure Sensor Malfunction
  • P042A – Exhaust Gas Temperature Sensor 2 Malfunction


Affected Vehicles:

  • Focus (Mk III) 2011-2015
  • C-Max (Mk II) 2010-2015
  • Galaxy (Mk III) 2010-2015
  • S-Max (Facelift) 2010-2015
  • Mondeo (Mk IV) 2007-2015
  • Kuga (Mk II) 2010-2015

Click here for more information on Mondeo and Kuga or Galaxy and S-Max


(Can’t find your part number? Check our full engine ECU catalogue forFocus or C-Max)

Test and rebuild:

Each engine ECU is rigorously tested on our bespoke HIL (Hardware-In-the-Loop) testing rigs both before and after rebuild. During rebuild only the highest rated components are used, a significant upgrade from manufacture standard components, to ensure that the ECU does not fail again.



No need for coding. Once you receive the ECU back it will be plug and play.



With a work defect rate lower than 0.49% it’s clear that we take quality very seriously.

Our strict quality control: encompassing testing, components and workmanship will ensure only the highest level of work is carried out to meet our lifetime warranty standards.



Lifetime unlimited mileage*


How do I get my unit rebuilt?

To pay for the rebuild select your part number above and then click: Get yours rebuilt

Print the payment/booking confirmation email.

Package the Focus/C-Max ECU inside a sturdy box with plenty of packaging material (make sure you include your confirmation email in the box).

Send us your package by tracked courier (the shipping instructions are on the confirmation email).

Once received we will test, rebuild and return your engine ECU with an unlimited mileage lifetime warranty. (if your unit turns out not to be faulty then we will refund your payment less a small testing fee and return shipping)


What if I don’t want to pay up front?

This is not a problem, if you prefer this option then follow the following steps:

Fill in and submit this test form.

Print the booking confirmation email.

Package the engine ECU inside a sturdy box with plenty of packaging material (make sure you include your confirmation email in the box).

Send us your package by tracked courier (the shipping instructions are on the confirmation email).

Once received, we will test your engine management ECU and call you to advise on the outcome of testing, if your unit is faulty and you choose to go ahead with the rebuild then we will take payment over the phone using a debit/credit card.

We will then rebuild your engine ECU and return it to you with an unlimited mileage warranty.

If you require further information regarding this Ford C-Max/Focus engine ECU then please contact us.

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Comments on "Ford Focus and C-Max not starting due to engine ECU fault."
Heimo Lappalainen says: 17/08/2022 05:25:17
Hi. My Ford Focus Diesel is model 2008. So getting old car. But if faint cheep ECU I like use a car sill some year longer?
ECU Admin says: 17/08/2022 09:28:15
Hi. We also offer test and rebuild service on older models, please see the following link:
Alexander Millen says: 07/03/2021 07:31:32
Hi, my ECU has the following part number BV61-12A650-AED (Delphi) Ford Grand C-Max. Can you test/repair this?
ECU Admin says: 08/03/2021 09:52:57
Hi Alexander, we can certainly help with that. To get started please see the following link
Killian Leonard says: 30/06/2020 20:01:05
How much for an ECU repair please?
ECU Admin says: 01/07/2020 09:06:00
Hi Killian, for prices and shipping information please select your part number or vehicle model above
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