Ford Mondeo: Faulty BCM Replaced, PATS Reinitialised and Keys Relearned
A Ford Mondeo had faulty brake lights and a faulty reverse light. Autobahn diagnosed a faulty Body Control Module (BCM), replaced and cloned it, programmed and coded it, reinitialised the PATS immobiliser and relearned the keys, after which the car started.
What the job record confirms
- Vehicle
- Ford Mondeo (year not stated)
- Problem
- Faulty brake lights and reverse light
- Diagnosis
- Faulty Body Control Module (BCM)
- Work carried out
- BCM replaced (new/donor unit) and cloned; fully programmed and coded; PATS (Ford’s immobiliser) reinitialised; keys relearned and key/PATS programming completed
- Result
- Vehicle started successfully; customer back on the road
- Location
- Manchester
- Equipment used
- FORScan
- Service
- Diagnostics and module programming
Source: this record is taken from Autobahn’s own Instagram post of 4 November 2025.
Why a lighting fault became immobiliser work
The fault looked electrical, and the cause was the BCM. Replacing the BCM was only half the repair: the replacement was cloned and coded to the car, and the PATS immobiliser was reinitialised with the keys relearned, because without that the car would not have started.
The job was finished only when the car started on its own keys, which it did.
Background: body control modules
The points below are general information about this kind of job. They explain the work; they are not additional details about this particular vehicle.
A BCM runs many body functions, such as lighting, locking and, on many vehicles, part of the immobiliser. A replacement or donor unit usually has to be programmed and coded to the car rather than simply plugged in.
Not recorded
To keep this record accurate, the following are not published because neither the original post nor Autobahn’s job notes state them: the model year.
Electrical fault you can’t pin down?
Send the registration and describe the symptoms.