Understanding Diagnostic Trouble Codes

Nowadays, every modern vehicle contains an electronic control unit (ECU) that takes care of many things, such as coolant flaws, exhaust filtering and airbag systems, ensuring everything runs smoothly and seamlessly.

Electronic control unit constantly runs in the background, making calculations in case something goes wrong.

In the event of some malfunction, ECU sends a signal to the car’s dashboard, a code consisting of a letter and four digits. These codes contain information regarding the specific problem found in the system and are known as DTC (Diagnostic Trouble Codes).

Some DTCs are standard, and some are manufacturer specific. The former codes are common and easy to recognise for each model, and the latter is unique and associated with a specific make and mode.

What is DTC Remover?

A DTC Remover is a small electronic tool that removes Diagnostic Trouble Codes. In short, this tool assists in fixing your car after a fault has been identified.

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Reidy Ramps – Safely Removing DTC from Your Vehicle

The ideal way to remove a DTC is to remap the ECU data to disable the codes. Every DTC is designed to indicate a specific issue; however, sometimes, DTC is triggered even if there is no issue. For example, if you remove your swirl flaps, DTC will trigger your dashboard.

DTC removal will allow the customers to remove any code that may be showing on the dashboard. Reidy Ramps will also help you remove parts such as DPF, EGR or intake flaps from the electronic control unit.

Where Do DTCs Come From?

Whenever a fault is detected, the onboard diagnostic (OBD) system generates DTCs. The OBD will detect the fault in your vehicle and display it on your dashboard.

Though several versions of OBD are used for detection, Reidy Ramps use two primary standards to read Diagnostic Trouble Codes:

  • OBD2: Suitable for light and medium-duty vehicles.
  • J1939: Appropriate for heavy equipment and heavy-duty vehicles.

One thing to remember is that though OBD2 is widely used for detection, some DTCs are still manufacturer specific.

DTC Removals

Reidy Remaps Can Offer

DTC Removal
DPF Removal
EGR Removal
Diagnostics Services
Custom Remaps /
Chip tuning
Immobiliser Repair /
Rolling Road /
Dyno Runs
Turbo Conversion Mapping Work on OEM ecu
DTC Removals

Common Categories of Diagnostic Trouble Codes

If the “check engine” light comes on in your vehicle, you must retrieve the codes via a code reader and write them down to accurately detect the fault.

OBD-2 are all universal codes to make it easier for people to understand them.

1. Powertrain Codes (P)

These are the most common codes, which include emission, transmission and engine systems. For instance, a P300 is known as a random misfire code, which means that any one of the cylinders is not working correctly as it should.

On the other hand, if the vehicle shows P303, it is simpler to diagnose because you can focus on Cylinder 3.

2. Body Codes (B)

This type of code deals with lighting, airbags and climate-control systems.

3. Chassis Codes (C)

The chassis codes comprise electronic suspension, antilock brakes and steering systems.

4. Network Communication Codes (U)

The last group DTCs are network communication codes. This group includes modules and controller area network wiring bus. This network makes sure all the modules are communicating with each other.

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Things to Keep in Mind Regarding DTCs

  • So many fault codes indicate defects and faults in several parts of the car. Therefore, if you notice something, Reidy Ramps will take it seriously and effectively detect and resolve the issue so that you won’t face any issues in the future.
  • Additionally, DTC delete does not necessarily guarantee that the problem will be solved because the faults could have arisen due to a mechanical flaw or an accident.
  • DTC delete will identify minor issues before they turn into major and problematic ones.
  • DTC issues are directly sent to the manufacturer and maintenance department, which makes the repair procedure more accessible and faster.