Guide to Fixing Mileage Odometer Freeze in Toyota Aygo (Peugeot 108 and Citroen C1) 3

The Toyota Aygo, along with its counterparts, the Peugeot 108 and Citroen C1, has gained popularity for its compact size, fuel efficiency, and overall reliability. However, like any vehicle, it may encounter technical issues over time. One common concern among owners is the manipulation of the mileage odometer, which can lead to discrepancies and inaccuracies in recorded mileage. In this guide, we delve into the intricacies of repairing the mileage odometer on these vehicles, specifically focusing on the 93c56 EEPROM found in the instrument cluster.

Understanding the Problem:

When attempting to correct the mileage odometer using tools such as the Digiprog 3 or other bad manipulation, owners may encounter a frustrating issue—despite the displayed mileage appearing correct, it remains frozen and fails to progress while driving. This discrepancy can lead to distrust and uncertainty regarding the actual mileage of the vehicle, which is a critical factor in assessing its value and condition.

Identifying the Solution:

Fortunately, there exists a reliable repair solution to address this persistent issue. By utilizing a programmer capable of reading the 93c56 EEPROM in 16-bit mode, owners can effectively edit specific lines within the EEPROM data to rectify the mileage odometer problem. The crucial steps involve accessing and editing lines 22 to 41, filling them with zeros (00), and ensuring that bytes 42 and 43 are filled with FF FF.

Step-by-Step Repair Process:

-Begin by carefully removing the instrument cluster from the vehicle, ensuring proper precautions are taken to avoid damage.

-Locate the 93c56 EEPROM chip within the instrument cluster. This may require disassembling the cluster further to access the chip.

-Using a compatible programmer capable of reading in 16-bit mode, like Xprog or UPA connect it to the 93c56 EEPROM and extract the data:

-Identify lines 22 to 41 within the extracted data and overwrite them with zeros (00) to reset the mileage values also Ensure that bytes 42 and 43 are filled with FF FF like in photo below:

-Once the necessary edits are made, reprogram the modified data back onto the 93c56 EEPROM chip.

-Reassemble the instrument cluster and reinstall it into the vehicle, ensuring all connections are secure.

-Test the vehicle to confirm that the mileage odometer now progresses accurately without any freezing issues.

By following this  guide, Toyota Aygo owners can effectively resolve mileage odometer issues that arise from manipulation attempts using tools like the Digiprog3 and other bad manipulation tools.