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The store behind the CarCodes channel
Upgrade and diagnose your car yourself.
OBD2 scanners, wireless cameras and CarPlay upgrades, selected by CarCodes and backed by free step-by-step guides.
1996+
Cars supported by OBD2 tools
Free
Step by step guides
Worldwide
Tracked An Post shipping
Chosen for practical drivers. Shipped to your door.
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An Post shippingTracked dispatch on every order
Free setup guidesClear help before and after you order
30-day returnsSimple, straightforward refunds
Helpful guidanceClear product and compatibility advice
CarCodes on YouTube
Watch the diagnosis before you buy the tool.
A simpler way to diagnose
Understand your car before replacing parts.
CarCodes gives you the same repeatable process used throughout our videos: read the code, understand the system, and test the inexpensive causes before replacing parts.
Plug in
Connect an OBD2 scanner beneath the dashboard. It takes less than two minutes.
Read the code
Turn a vague warning light into a specific fault such as P0420, P0171, or P0300.
Fix smart
Follow our cheapest-cause-first guides and replace only the part the evidence points to.
Free fault-code library
Diagnose before you replace.
Check Engine Light On? Do These 5 Things First (Before the Shop)
A check engine light doesn't have to mean a big bill. These 5 steps tell you in minutes whether it's a $5 fix, a safe-to-drive issue, or somet...
Read the guideHow to Use an OBD2 Scanner: Beginner's Guide (No Mechanic Needed)
Plug in, read the code, understand it, fix the cheap cause first. The complete beginner's guide to using an OBD2 scanner on any car from 1996 ...
Read the guideP0171 System Too Lean: The $20 Fix Most People Miss
P0171 means too much air or too little fuel on bank 1. Nine times out of ten the fix is a dirty MAF sensor or a cracked vacuum hose – not an e...
Read the guideBefore you buy
Straight answers.
Still unsure? Visit the full FAQ or send us your make, model, and year.
Will an OBD2 scanner work with my car?+
Generally yes for US-market cars from 1996 onward, EU petrol cars from 2001, and EU diesel cars from 2004. See our compatibility guide for regional details.
Do the cameras and CarPlay products fit any car?+
Yes. The wireless cameras and CarPlay displays are universal and install without cutting factory wiring. Each product page lists exactly what is in the box.
Do I need a subscription?+
Handheld scanners work without one. Bluetooth adapters may use a free or paid app; every product page clearly states what is required.
What if the product does not work for me?+
You have 30 days from delivery to request a return. Contact us and we will guide you through the next step.
OBD2 scanners, reversing cameras, and CarPlay upgrades
CarCodes provides OBD2 scanners, Bluetooth diagnostic adapters, wireless reversing cameras, CarPlay displays, and practical guides for common diagnostic trouble codes including P0420, P0300, and P0171. Use our OBD2 compatibility guide, browse fault-code walkthroughs, or contact CarCodes before buying.