How to Read Diagnostic Trouble Codes During a Second-Hand Car Inspection?

Buying a used car can feel like a bit of a gamble without a proper second-hand car inspection. But checking diagnostic trouble codes can give you a clearer picture of the car’s health. Think of these as digital clues that can uncover hidden problems you wouldn’t spot during a regular visual inspection.

Second-Hand Car Inspection | What Are Diagnostic Trouble Codes?

DTCs are like your car’s way of telling you something’s off. These alphanumeric codes are stored in the computer system when sensors detect an issue. Most modern cars use the OBD-II system.

This standardizes these codes across different makes and models. You can plug into the diagnostic port, usually under the dashboard, and quickly uncover details about key systems of the car with an OBD-II scanner.

How to Check DTCs When Buying a Used Car in Melbourne

Here’s how you can do it: find the OBD-II port in the car, plug in your scanner and turn the ignition to the “on” position (but don’t start the engine). The scanner will then read the car’s computer and display any stored codes. These codes look like a letter followed by four digits, like P0420, which could point to a catalytic converter issue.

Write down all the codes and do a little research. Some might be small fixes but others could mean costly repairs.

Pay close attention to anything related to the engine, brakes or safety systems- those are the big ones to concern about.

Second-Hand Car Inspection | Catch Hidden Problems with a Second-Hand Car Check

DTCs are a great starting point. But they’re just one piece of the puzzle. Pairing a code scan with a professional second-hand car inspection is the best way to really know what you’re getting into. Don’t let unexpected issues turn your dream car into a money pit!

Ready for a thorough used car inspection in Melbourne? Contact Greasemonkey Inspectors today, and we’ll help you hit the road with peace of mind.