OBD Knowledge

Discover everything you need to know about OBD codes in OBDCodex’s OBD Knowledge category, covering OBD2 codes for newer vehicles and OBD1 code lists for older models.

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P0304 – Cylinder 4 misfire detected

OBD CodexApr 20, 20246 min read
P0304 – Cylinder 4 misfire detected The cylinders in your engine are what provide its power. When they don’t fire correctly, your car will drive rough and be at risk for further damage. The P0304 OBD2 code is your first warning sign of misfires in your engine. The P0304 code can be severe, so it’s […]
p1777 nissan

P1777 Nissan Code: A Practical Repair Guide

OBD CodexApr 20, 20246 min read
P1777 Nissan Code: A Practical Repair Guide Dealing with a P1777 code in your Nissan can be frustrating. Do not fret! – In this guide, we’ll walk you through simple steps to tackle the issue. We’ll cover needed tools, explain the repair process, and discuss DIY feasibility.  This empowers both DIYers and those seeking professional […]
p0138

P0138: O2 Sensor Circuit High Voltage (Bank 1, Sensor 2)

OBD CodexApr 20, 20246 min read
P0138: O2 Sensor Circuit High Voltage (Bank 1, Sensor 2) Did your scan tool show the P0138 code? Do you wonder what it means and whether you can continue to drive? Keep reading to have a first evaluation of the situation.  Luckily, P0138 is safe to drive in a short period! But to avoid more […]
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P0304 – Cylinder 4 misfire detected

OBD CodexApr 20, 20246 min read
P0304 – Cylinder 4 misfire detected The cylinders in your engine are what provide its power. When they don’t fire correctly, your car will drive rough and be at risk for further damage. The P0304 OBD2 code is your first warning sign of misfires in your engine. The P0304 code can be severe, so it’s […]
p026a

P026A Code: Causes & Solutions for Charge Air Cooler Issues

OBD CodexApr 20, 20247 min read
P026A Code: Causes & Solutions for Charge Air Cooler Issues Got a P026A DTC (diagnostic trouble code)? Don’t panic. This expert guide can help you understand the code and get it fixed with ease. So, what does the code P026A mean? Simply put, it indicates that the Charge Air Cooler is not working as effectively […]