Workshop · diagnostics and repairsWe reply the same day
Diagno.ee

All Ford fault codes

Engine computer and electrics

P1260 Theft detected, engine immobilised

By: · Updated:

P1260 means: Theft detected, engine immobilised. The immobiliser checks that the key is the right one. Don't drive until the car has been checked. The engine could be damaged. The most common repair costs about €90–180 in Estonia, depending on make and model. The most common cause: key chip or battery.

Is it safe to drive?Don't driveDon't drive until the car has been checked. The engine could be damaged.
Key or immobiliser repair€90–180parts and labour in Estonia, depending on make and model

What it means

The immobiliser checks that the key is the right one. The computer didn't get proper confirmation from the key or immobiliser and may block the engine from starting.

This is a make-specific code (Ford). The exact meaning can vary by model and year.

What you may notice

  • The engine won't start or stalls straight away
  • Immobiliser light flashing

What could be wrong

  1. 1Key chip or battery · Key or immobiliser repair €90–180
  2. 2Key reader coil around the ignition · Key or immobiliser repair €90–180
  3. 3Communication between immobiliser and engine computer · Control unit check and software €150–300
  4. 4Low battery voltage · Battery replacement €120–220

Repair difficulty: Hard

What you can check yourself

Try the spare key. If the car starts with it, the fault is in the first key. Best left to a workshop. It needs a diagnostic tool and experience.

How we fix it

  1. We read the immobiliser data with the diagnostic tool
  2. We check the key and reader coil
  3. We re-learn the key or repair the system

Standard SAE description: Theft Detected - Vehicle Immobilized

This code usually comes with: Check engine lightSee what the light means →

Related symptoms: Car won't start · Rough idle or engine stalling

Want a definite answer?

Bring the car to our workshop in Estonia for diagnostics. We read the fault codes, test the sensors and tell you what is wrong. Repair price depends on the work involved, generally €45 per hour.

Book a diagnostic check

Questions

What does fault code P1260 mean?

Theft detected, engine immobilised. The immobiliser checks that the key is the right one. The computer didn't get proper confirmation from the key or immobiliser and may block the engine from starting.

Can I drive with code P1260?

Don't drive until the car has been checked. The engine could be damaged.

How much does it cost to fix P1260?

It depends on the cause: key or immobiliser repair €90–180; control unit check and software €150–300. Prices include labour at €45/h, depending on make and model.

How is P1260 fixed?

We read the immobiliser data with the diagnostic tool. We check the key and reader coil. We re-learn the key or repair the system.

Related codes

P0603Engine computer lost its learned valuesP0604Control module: internal memory or software fault (RAM)P0605Control module: internal memory or software fault (ROM)B1600PATS: key transponder signal not receivedB1601PATS: incorrect key code receivedB1602PATS: invalid key code formatP1000On-board self-checks not yet complete (OBD readiness)P1386Internal knock control fault in the engine computer

Based on AI combined with our hands-on workshop experience and knowledge. This information is general and prices are approximate (Estonian workshop rates). The same code can mean different things on different cars. Only an inspection of the car gives a definite answer.

Book a diagnostic check