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Correcting car mileage is often necessary when the vehicle’s odometer reading is inaccurate.
This could be due to a faulty odometer, a malfunction in the vehicle’s ECU (Electronic Control Unit), or the replacement of the odometer itself.
Mileage discrepancies can also occur when the car undergoes repair or when components like the ECU or instrument cluster are replaced.
Mileage correction is also needed for vehicles that have been imported from other countries or for those with salvaged titles where the original mileage data is unavailable or unreliable.
Methods for Correcting Car Mileage
One of the most effective and widely used methods for correcting car mileage is through an OBD2 scanner.
These devices plug into your car’s OBD2 port and can interface with the vehicle’s ECU to reset or adjust the mileage reading.
Many OBD2 scanners on the market come with advanced features specifically designed for mileage correction.
Some of the more specialized devices allow users to access vehicle ECU programming and adjust the mileage directly.
2. Reprogramming the ECU
The ECU reprogramming method is another way to correct car mileage, though it’s typically more complicated.
Reprogramming involves accessing the vehicle’s computer systems, which manage critical operations like the fuel system and the transmission.
Some vehicles allow technicians to directly input mileage data into the ECU via specialized software.
This method requires professional grade software and hardware, and it’s essential to use this technique in accordance with the law.
When reprogramming the ECU, mileage data can be overwritten to match the corrected odometer reading, ensuring that the vehicle's data is accurate.
3. Replacing the Odometer
If your car’s odometer is broken, faulty, or has been replaced, mileage correction may be needed to ensure the new odometer displays the correct reading.
When replacing an odometer, it’s crucial that the new odometer is programmed to reflect the vehicle’s actual mileage, which may require a professional to perform the task.
4. Using a Mileage Correction Service
If you prefer not to tackle the process on your own, there are professional mileage correction services that can help.
These services specialize in fixing odometer issues and correcting inaccurate mileage readings.
The technician will use advanced tools and software to correct the vehicle’s mileage, and they will ensure the correction is legal and accurately documented.
When using a mileage correction service, make sure the service is reputable and operates within the legal framework of your country or state.
In the US, mileage correction is heavily regulated, and incorrect usage of these services can lead to legal complications.
Related Reading: What Is Mileage Correction and Why Is It Important
Popular OBD2 tools for mileage correction
Ancel DP500 odometer correction tool that makes odometer adjustment quick and easy. Whether your odometer is giving you inaccurate readings, you're replacing the instrument cluster, or just need to reset the mileage after a repair, the Ancel DP500 has you covered.
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Odometer Adjustment: This tool allows you to easily adjust and correct your vehicle’s mileage, making sure it’s always accurate.
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Key Programming: Need to add a new key or program a remote? The DP500 lets you program keys, read PIN codes, and even access deeper data from the EEPROM chip for more advanced diagnostics.
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11 Special Functions: From oil reset to ABS bleeding to battery matching, this tool has a ton of features that help keep your car running smoothly and save you time at the shop.
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1 Year Free Upgrade: With free updates for a year, you'll always have access to the latest diagnostic capabilities and repair features.
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Lifetime Support: Plus, you get lifetime technical support, so you'll never be left hanging when you need help.
$799.99
Things to Know About Mileage Adjustment
It’s essential to understand that correcting your car’s mileage is not always legal. Mileage manipulation is considered fraud if it’s done with the intent to deceive buyers or alter the vehicle's history.
When correcting your car's mileage, always ensure that the adjustments are made for legitimate reasons such as fixing faulty hardware or replacing broken components.
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In the US, under the Truth in Mileage Act (TIMA), it’s illegal to alter or tamper with an odometer with the intention of changing the mileage reading for the purpose of deception.
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Car title regulations: Any adjustments made to the mileage should be noted in the car's history or title documentation.
FAQs
Is mileage correction legal?
Mileage correction is legal in certain situations, such as when the odometer is faulty or being replaced. However, it becomes illegal if done with fraudulent intent, such as to deceive potential buyers. Always ensure the correction is done transparently and for legitimate reasons.
How long does it take to correct a car’s mileage?
The time required to adjust a car’s mileage depends on the tool used and the complexity of the issue. Generally, mileage correction can take anywhere from a few minutes to an hour, especially if additional diagnostic work is required to ensure accuracy.
Do all OBD2 scanners support mileage correction?
Not all OBD2 scanners support mileage correction. It’s essential to use a high-quality diagnostic tool that specifically offers this feature. Tools like the Ancel DP500 are designed to handle mileage adjustments, along with a variety of other diagnostic tasks, ensuring comprehensive vehicle maintenance.
