P1260 Theft Detected Vehicle Immobilized

OBD2 Code: P1260

Description: Theft detected, vehicle immobilized.

Definition: This code indicates that the vehicle’s anti-theft system has been triggered, causing the engine to be disabled to prevent theft. The Powertrain Control Module (PCM) receives a signal from the anti-theft module indicating an unauthorized attempt to start or move the vehicle.

P1260 – Theft Detected Vehicle Immobilized

Severity: Critical

Common Causes

P1260 – Theft Detected Vehicle Immobilized

Common Causes:

• Incorrect key code used
• Faulty transceiver module
• Issues with the PATS system (Passive Anti-Theft System)
• Wiring or connection issues related to the anti-theft system

 

Common Misdiagnosis

OBD2 Code: P1260

Description: Theft Detected Vehicle Immobilized

Common Misdiagnosis: Replacing the PCM (Powertrain Control Module) or immobilizer system components without verifying if the issue is due to a faulty key fob battery or incorrect key programming.

 

Common Diagnostic Steps

OBD2 Code: P1260

Description: Theft Detected, Vehicle Immobilized

Common Diagnostic Steps:

• Verify the presence of the code using an OBD2 scanner.
• Check for any additional codes that may be present and address them first.
• Inspect the vehicle’s anti-theft system components, including key fob, ignition switch, and immobilizer module.
• Ensure the battery is fully charged and in good condition.
• Test the communication between the immobilizer module and other control modules using a diagnostic tool.
• Examine wiring and connectors related to the anti-theft system for damage or corrosion.
• If equipped with a transponder key, verify its functionality and reprogram if necessary.
• If applicable, reset or reprogram the anti-theft system according to manufacturer instructions.
• Clear the code from the ECU and perform a test drive to ensure it does not return.