OBD2 Info Guides

Quick Answer P0401 means the engine computer detected less exhaust gas recirculation, or EGR, flow than expected. Common P0401 causes…

Modern OBD2 scanners help Silverado owners read trouble codes, check live engine data, and clear warning lights. They can turn…

A code reader helps us find and understand problems in a vehicle’s engine, transmission, emissions, and other systems. For an…

An OBD2 scanner helps us read a vehicle’s diagnostic codes when the check-engine light turns on. For an F-150, it…

A code reader helps Prius owners understand warning lights and check for problems without visiting a repair shop first. These…

A Prius can show warning lights for issues that a basic code reader may not fully explain. An OBD2 scanner…

Quick Answer The most common P0411 symptom is a Check Engine Light, and many vehicles show no obvious drivability problems…

Quick Answer P0411 means your vehicle’s computer detected incorrect airflow from the secondary air injection system. The problem often involves…

Quick Answer To fix P0402, first confirm the code and save the freeze-frame data with an OBD2 scanner. Then inspect…

Quick Answer P0402 means the engine computer has detected more exhaust gas recirculation, or EGR, flow than expected. The most…

Quick Answer The most common P0325 symptoms are a check engine light, sluggish acceleration, hesitation, reduced engine power, and sometimes…

Quick Answer Common P0335 symptoms include a check engine light, hard starting, extended cranking, intermittent stalling, rough running, hesitation, weak…

Quick Answer P0325 repair cost can range from a relatively inexpensive wiring repair to more than $1,000 on vehicles where…

Quick Answer To fix P0325, confirm the code with an OBD-II diagnostic scan, inspect the Knock Sensor 1 wiring and…

Quick Answer P0335 means the engine computer has detected a problem with the crankshaft position sensor “A” circuit or cannot…