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Ford Focus 2010 TDCI P0606 Fault Code: Causes, Fixes, and Solutions

Model: Ford Focus 2010 TDCI Fault Code: P0606 Posted: 2017-02-06 14:13

I'm looking for help regarding a P0606 fault code on my 2010 Ford Focus TDCI. This error has appeared unexpectedly — has anyone else experienced this issue? If so, what was the root cause and how was it resolved? The vehicle is stock with no major modifications, only fitted with a basic sat-nav and a 12V power dongle in the cigarette lighter socket. I'd appreciate any insights or troubleshooting steps to diagnose whether this is related to aftermarket devices or a deeper issue like a failing Powertrain Control Module (PCM).

Related fault codes
P0606
Comments (7)
Anonymous 2017-02-06 15:16

P0606 is a serious fault code indicating a problem with the PCM programming or memory. It often points to a failed PCM, which is not a common failure but should be taken seriously. First question: Is your vehicle stock? Have any aftermarket parts, modifications, or devices been installed?

Anonymous 2017-02-06 15:39

No, the vehicle has no modifications beyond standard factory equipment.

Anonymous 2017-02-06 16:30

What does 'm8t' refer to? Could it be a reference to an aftermarket tuning device or ECU modification?

Anonymous 2017-02-06 16:50

No, only a standard sat-nav and a 12V power dongle installed in the cigarette lighter — both used independently as needed.

Anonymous 2017-02-06 17:22

Important point: There is no device connected to the Diagnostic Link Connector (DLC). The 12V power source comes only from the vehicle's battery. What exactly does the dongle connect to — for example, is it linked directly to the navigation system?

Anonymous 2017-02-06 17:29

Yes, the dongle uses only a 12V power supply and operates independently; it does not interface with the vehicle's ECU or DLC.

Anonymous 2017-02-07 09:16

Given that no aftermarket hardware is present, the P0606 code likely points to a failing Powertrain Control Module (PCM). PCMs are typically covered under an 8-year warranty on Ford vehicles. I recommend contacting your local Ford dealer for inspection and potential replacement of the PCM.