contact_supportDiagnostic Trouble Code (DTC)

What is a Diagnostic Trouble Code

The engine control system in your car can – up to a certain point – diagnose problems that may be affecting your vehicle’s emissions or engine performance. When some trouble is detected, the system returns a certain code, indicating the nature of the issue. The code returned is called a Diagnostic Trouble Code or DTC.

check_circleDTC Description

How is a DTC formed?

A DTC contains 5 digits, as shown below.

XXXXX

Each digit has a specific meaning.

  • P – Powertrain (Engine & Transmission)
  • B – Body (Includes A/C & Airbags)
  • C – Chassis (Includes ABS)
  • U – Network / Bus
  • 0 – Generic
  • 1 – Vehicle Specific
  • 1 – Fuel & Air metering
  • 2 – Fuel & Air metering (Injector circuit)
  • 3 – Ignition System or Misfire
  • 4 – Auxiliary Emission Controls
  • 5 – Vehicle Speed Control & Idle Control System
  • 6 – Computer Output Circuit
  • 7, 8, 9 – Transmission
  • A, B, C – Hybrid propulsion
  • Fault Description

Example

DTC: U0609 – That’s a Network/Bus issue, generic in nature (not specific to this vehicle). It concerns the computer output circuit. Its classification is “09”, which matches a specific error description that will most likely help you find out what’s wrong with your vehicle.

DTC was last modified: April 27th, 2020 by Veturilo