OBD2 Fault Code Lookup

Enter your diagnostic trouble code (DTC) below to find out what's wrong and how to fix it.

What is an OBD2 Code?

OBD2 (On-Board Diagnostics) codes are the car's way of telling you something is wrong. The system monitors the engine, transmission, and emissions systems. When a sensor reports data outside of normal operating limits, a code is stored and the check engine light is usually triggered.

Understanding the Format

Codes follow a standard structure:

  • Pxxx: Powertrain (Engine/Transmission)
  • Bxxx: Body (Airbags/Safety)
  • Cxxx: Chassis (Brakes/Suspension)
  • Uxxx: Network (Communication)

Professional Insight

While descriptions help, complex timing chain or electronic issues often require OEM-level technical drawings to fix properly. Independent workshops can access this depth of data within the AutoChain Platform.

Platform Logic

Why Clearer Infrastructure Matters to Both Drivers and Garages

Most problems in vehicle ownership are not caused by a lack of effort. They come from fragmented information. AutoChain is designed to close those gaps by giving both sides a clearer way to keep the history of the vehicle usable after the job is finished.

What better infrastructure fixes

A driver can care about the car and still lose track of service dates if reminders, invoices, MOT history, and approvals all live in different places. A garage can carry out good work and still struggle to retain customers if the record of that work is hard to retrieve later.

Better infrastructure matters because it makes the history usable again. It gives the owner and the workshop a stronger basis for the next decision instead of forcing both sides to reconstruct what happened from memory.

Why it matters in practice

Trust is built when the customer can see what happened, the garage can prove what was done, and the next decision starts with better context than the last one.

Trust improves

Customers can see what happened, garages can prove what was done, and the next decision starts with better context.

Economics improve

On-time reminders protect repeat business, cleaner records support price, and better visibility reduces wasted diagnosis.

Handovers improve

Approvals, complaints, resale discussions, and ownership transfers become easier to manage with a stronger evidence trail.

The market improves

Independent garages and informed drivers both benefit when the ownership story becomes easier to follow.

AutoChain combines driver tools, provider workflows, reminder systems, digital service history, and educational content because each part becomes more useful when it strengthens the same central outcome: a clearer, more credible, and more transferable record of what has happened to the vehicle and why it matters.