Immobilisers & Key Coding in Telford
Modern immobilisers are part of a security network that ties the key, the ignition/column module and the engine ECU together with rolling codes and security linking. When any part of that chain fails — or a key is simply lost — you cannot fix it with a generic key cutter. We programme keys and resolve immobiliser faults using the manufacturer's own tools, which means we can add keys, recover all-keys-lost situations and re-link modules the way the dealer does.
Common Symptoms
If you are seeing any of the following, it points to a immobilisers & key coding issue we can diagnose:
- Car won't start — key not recognised or immobiliser light flashing
- Lost all keys and need a replacement key programmed from scratch
- Want an additional spare key coded to the vehicle
- Key turns but the engine cuts out after a few seconds
- Immobiliser module replaced and now the car won't link
- Intermittent non-start that only happens in certain conditions
Common Causes
Faults like this rarely have a single cause. The usual culprits we find are:
- Transponder chip in the key lost, damaged or de-synchronised
- CAS / EIS / CIM / BCM immobiliser module failure
- Key and ECU security link lost after a battery or module swap
- Faulty ring antenna around the ignition barrel
- Corrupted key data after a failed DIY programming attempt
How We Diagnose Immobilisers & Key Coding
Book in your vehicle.
Tell us about the symptoms you're seeing — we'll diagnose it properly with dealer-level tooling and come back with the next steps.