OBDII Code Lookup

Got a check engine light code? Type it in here!

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Understanding OBD-II Codes

An OBD-II code, which stands for On-Board Diagnostics II, is a system used by your car's computer to signify issues. Think of it as a language your vehicle's onboard doctor uses to communicate problems. When the Check Engine Light turns on, it's an alert signaling that your car needs attention.

OBDII Code Structure:

Trouble Code SubSystem (First Character):

P - Powertrain (engine and transmission systems)

B - Body (airbags and seatbelts)

C - Chassis (suspension and steering)

U - Network (communication issues inside the vehicle)

Type of Code (Second Character):

0 - Generic (common to all vehicles, standardized as ISO/SAE)

1 - Manufacturer-specific (unique to specific car brands)

Affected SubSystem (Third Character):

1 - Secondary Air Injection System

2 - Fuel System

3 - Ignition System

4 - Exhaust Monitoring System

5 - Idle Speed Control or Cruise Control

6 - Input/Output Signal from ECU

7 and 8 - Transmission System

Specific Code (Fourth and Fifth Characters):

02 - indicates a misfire detected in the 2nd cylinder

Example Code: P0430

'P' - Powertrain system issue

'0' - Standardized code (ISO/SAE)

'4' - Exhaust Monitoring System issue

'30' - Low efficiency within the catalyst system (bank 2)

For automotive professionals and enthusiasts, these codes simplify diagnosing car problems, reducing the time and guesswork involved. With the right scan tool, even car owners can read these codes, helping them decide whether to address the issue themselves or seek a mechanic's help.

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