Problema con la llave del Fiat 500X: ¿cuál es la causa?

Here is how to solve the problem of a stuck key in the Fiat 500X: diagnosis of the problem and solution in the workshop bulletin

The Fiat 500X, one of the emblematic models of the Turin brand, has won over a large clientele thanks to its attractive design and versatility. However, some vehicle owners from between 2014 and 2016 have encountered a common problem: the inability to remove the ignition key after turning off the engine. This defect, often accompanied by other anomalies such as the ESP warning light and the electric parking brake not releasing, can be frustrating and requires precise diagnosis to resolve it. In the following paragraphs, we will see how to solve it.

Fiat 500X with Locked Key: Causes of Failure

The problem is usually attributed to a faulty software in the ESP/ABS control unit, which is responsible for managing various vehicle safety functions, including Electronic Stability Control (ESP) and Anti-lock Braking System (ABS). The most common symptoms include:

The inability to remove the key from the ignition lock.

The ESP warning light coming on during driving, especially in curves.

The electric parking brake not releasing when the «Auto-Hold» function is active.

These failures not only compromise the ease of use but can also affect the vehicle’s safety.

Diagnosis of the Key Problem in the Fiat 500X

To correctly identify the cause of the problem, Hella experts recommend following the following steps:

Check the condition of all related components, including the ignition switch, brake system, and wiring harness.

Run an OBD diagnosis to read and clear any stored errors in the ESP/ABS control unit. This step is essential to identify specific anomalies and rule out other possible causes.

Check the operating conditions. After clearing any errors, see if the symptoms persist while driving the vehicle.

Solution for the Key Not Being Released in the Fiat 500X

If no specific errors are detected in the fault memory and the symptoms described above continue to occur, the problem is likely due to a faulty software in the ESP/ABS control unit. In this case, we recommend updating the software of the control unit.