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Created with Fabric.js 1.4.5 OBD2 Codes OBD2 Codes What are they and how to clear them What are they and how to clear them The OBD acronym refers to On-Board Diagnostics. OBDI or OBD1 systems were introduced in all computerized cars up to 1995. OBD2 or OBDII is a newer generation of on board diagnostics system which was introduced in 1996 to standardized the trouble codes. All car manufactured for the USA from 1996 to date are required to have an OBD-II compliant system. OBD1 OBD2 OBD and OBD2 Codes Explained P - PowertrainB - BodyC- ChassisU - Network 0 - Generic (SEA)1 - Manufacturer Specific 1 - Fuel & Air Metering2 - Fuel & Air Metering (Injector Circuit Malfunctions Only)3 - Ignition System or Misfire4 - Auxiliary Emission Controls5 - Vehicle Speed & Idle Control System6 - Computer & Auxiliary Outputs7 - Transmission8 - Transmission Specific Fault Index P O 3 0 1 Looking at the image we can see the OBD-II Trouble Code "P0301" which stand for Misfire Detected in #1 Cylinder. Here is the break downP - Power-trainO - Generic3 - Ignition system "misfire"01 - Specific fault "Cylinder #1" Based on that, we can see that OBD2 Codes "P0302 and P0303" stand for the same problem but different cylinder number. Check engine light On, It simply meansthat your cars on-board computer (ECU)sensed something not normal in your engineand it's telling you that your engine needssome attention.It might not be serious but have it checked anyway. Check Engine Light Check Engine Light No check engine light on the dashboard sounds likea good thing, but if the light does not come Onwhen you turn the ignition key On then goes Offwhen the engine start, That's not a good thing.And it's not even a good idea to drive the car withoutfinding why the check engine light does not come. Blinking check engine light is an indicator of a serious engine problem "Misfire" which can cause a serious mechanical damage to your engine parts like "Pistons, Rings, Valves, Exhaust manifold and Catalytic Converter" these are expensiveparts and not that cheap to replace.Have your car checked by a mechanic ASAP. OBD2 Code Scanners OBD2 Code Scanners P0302 : Misfire Detected in Cylinder Number 2P0303 : Misfire Detected in Cylinder Number 3 USB Code Scanner:Plug one end into the OBD2 connector onyour vehicle.The other end to a laptop USB connectorcomes with easy to install & use software Hand-Held Code Scanner:Plug one end into the OBD2 connector onyour vehicle.Read the error codes on the screen.You can clear the codes andturn off the check engine light too Wireless OBDii Code Scanner:Plug it into the OBD2 connector on your vehicle.Connect to it with your wireless laptop or your smart phone.TORQUE is good smart phone app to use. OBD2 Most Common Codes OBD2 Most Common Codes P0420 - Catalyst System Low EfficiencyP0171 - Fuel Trim System Lean Bank 1P0401 - Exhaust Gas Recirculation (EGR) Flow InsufficientP0174 - Fuel Trim System Lean BankP0442 - Evaporative Emission (EVAP) System Small Leak DetectedP0300 - Engine Misfire Detected (random misfire)
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