Diagnostic Trouble Codes - What They Mean & How to Fix Them
Your vehicle's on-board diagnostic system stores trouble codes when it detects issues to make diagnosing problems easier. Learn what these codes mean.
How to Read OBD 2 Codes - AutoZone
OBD 2 codes, also known DTCs or diagnostic trouble codes, are like a secret language your car uses to communicate issues. When a problem is detected within your vehicle’s systems, the OBD 2 system generates a code that corresponds to a specific issue or malfunction.
OBD 2 Code List - AutoZone
Get insights into your vehicle's health by understanding OBD 2 codes. Explore our list of common codes, their meanings, and expert tips for diagnosis and repair.
P0171 & P0174 Trouble Codes - Diagnosis, Causes, Symptoms
P0171 or P0174 readings indicate too lean of a system in one of your cylinder banks. Learn common causes and solutions to these trouble codes.
P0303 Trouble Code - Diagnosis, Causes, Symptoms & How to Fix …
Learn what the P0303 diagnostic trouble code means and how to troubleshoot a misfire in cylinder 3 of your engine with AutoZone.
P0442 Trouble Code - Diagnosis, Causes, Symptoms & How to Fix …
The diagnostic trouble code is the code your OBD generates to tell you something is wrong. The DTC allows you to home in on the system that is not functioning properly. For example, if your vehicle’s OBD detects a leak in the evaporative emission system, you may see a P0442 code.
P2004 Trouble Code - Diagnosis, Causes, Symptoms & How to Fix …
If you get an OBD-II scanner error code P2004 problem that means the intake manifold runner control actuator is stuck in the open position. This simple guide will explain exactly what that means and what you should do about it.
Code Reader - OBD2 Scanner & Car Diagnostic Tool - AutoZone
Next time your engine throws a code, turn to AutoZone for an easy-to-use code reader or diagnostic tool. A broken down car is nothing but a bummer - even worse, waiting on a mechanic is also a pain. Easily diagnose your car problem with …
P0456 Trouble Code - Diagnosis, Causes, Symptoms & How to Fix …
A failure to maintain the correct fuel tank pressure results in trouble code P0456. This means that a leak is allowing vapors to escape, either directly from the fuel tank or from related hoses and parts.
P0420 and P0421: Catalyst Trouble Codes - AutoZone
Whether you’ve noticed some performance issues or only receive an OBD-II scanner error code, you’re probably wondering, what exactly is the deal with trouble codes PO420 and P0421? These error codes are general indications that something is causing your catalytic converter to not function properly.
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