What is an OBD2 code?

An OBD2 (On-Board Diagnostics) code is a diagnostic trouble code (DTC) generated by your vehicle's computer system when it detects a problem. These codes help identify specific issues with your vehicle's engine, transmission, emissions, or other systems.

How do I read OBD2 codes?

To read OBD2 codes, you'll need an OBD2 scanner. Plug it into your vehicle's OBD2 port (usually located under the dashboard), turn your key to the 'ON' position, and follow your scanner's instructions to retrieve the codes. Each code starts with a letter (P, B, C, or U) followed by four numbers.

What do the different types of OBD2 codes mean?

OBD2 codes are categorized by their first letter: P (Powertrain) for engine and transmission issues, B (Body) for interior systems like airbags, C (Chassis) for mechanical systems like brakes, and U (Network) for computer and module communication problems.

OBD2 Code Lookup - Free Check Engine Light Diagnostic Tool

📋 All U Codes (1,230 codes)

P B C U ← All

Code	Type	Action
U3559	Diagnostic	Diagnose ⚡
U355A	Diagnostic	Diagnose ⚡
U355B	Diagnostic	Diagnose ⚡
U355C	Diagnostic	Diagnose ⚡
U355D	Diagnostic	Diagnose ⚡
U355E	Diagnostic	Diagnose ⚡
U355F	Diagnostic	Diagnose ⚡
U3560	Diagnostic	Diagnose ⚡
U3561	Diagnostic	Diagnose ⚡
U3562	Diagnostic	Diagnose ⚡
U3563	Diagnostic	Diagnose ⚡
U3564	Diagnostic	Diagnose ⚡
U3565	Diagnostic	Diagnose ⚡
U3566	Diagnostic	Diagnose ⚡
U3567	Diagnostic	Diagnose ⚡
U3568	Diagnostic	Diagnose ⚡
U3569	Diagnostic	Diagnose ⚡
U356A	Diagnostic	Diagnose ⚡
U356B	Diagnostic	Diagnose ⚡
U356C	Diagnostic	Diagnose ⚡
U356D	Diagnostic	Diagnose ⚡
U356E	Diagnostic	Diagnose ⚡
U356F	Diagnostic	Diagnose ⚡
U3570	Diagnostic	Diagnose ⚡
U3571	Diagnostic	Diagnose ⚡
U3572	Diagnostic	Diagnose ⚡
U3573	Diagnostic	Diagnose ⚡
U3574	Diagnostic	Diagnose ⚡
U3575	Diagnostic	Diagnose ⚡
U3576	Diagnostic	Diagnose ⚡

Showing page 13 of 13 (1,230 total codes)

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🔧 U Codes Directory

📋 All U Codes (1,230 codes)