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🔧 B Codes Directory

Browse all OBDII B diagnostic trouble codes. Click any code to see meaning, symptoms, causes, diagnostics, repairs, and costs.

📋 All B Codes (300 codes)

Code Plain-language meaning Type Action
B2300 The car's computer is having trouble remembering where you like your seat to be positioned. Diagnostic Diagnose
B2301 This code means that the car is having trouble remembering where the passenger seat should be. It's like when you can't remember where you put your favorite toy. Diagnostic Diagnose
B2320 This code means there's a problem with the part of your car that tells the mirror how far to move left or right. It's like the mirror can't figure out where it's supposed to be. Diagnostic Diagnose
B2321 This code means there's a problem with the part of your car that helps the side mirror move left and right. It's like the mirror's 'brain' can't tell where the mirror is pointing. Diagnostic Diagnose
B2322 This code means there's a problem with the wires that help the car's side mirror move left and right. It's like when a toy's remote control gets stuck because the wires are crossed. Diagnostic Diagnose
B2323 This code means there's a problem with the part of the car that helps move the side mirror left and right. It's like a wire is touching something it shouldn't, making it hard for the mirror to move properly. Diagnostic Diagnose
B2601 This code means that when the car door was supposed to close, it didn't latch properly and opened back up. Diagnostic Diagnose
B3000 This code is like a placeholder or a reserved spot in a book. It doesn't have a specific meaning yet, but it might be used for something important in the future. Diagnostic Diagnose
B3A00 This means that a part in the car's air conditioning system, which helps control how cold air is spread, is not working properly. It's like a door that's supposed to open and close but is stuck. Diagnostic Diagnose
B3A01 This code means there's a problem with the part of the car that helps control the air conditioning. It's like a switch that isn't working right, so the air conditioner might not cool the car properly. Diagnostic Diagnose
B3A02 This code means there's a problem with the part of your car's air conditioning system that controls how the cold air is spread around. It's like when a switch in your house doesn't work properly, and you can't turn on a light. Diagnostic Diagnose
B3A03 This code means there is a problem with a part of the car's air conditioning system. It's like a switch that helps control how the cold air moves, and it's not working right. Diagnostic Diagnose
B3A04 This code means that there's a problem with the part of the car's air conditioning system that controls how the cold air is spread out. It's getting too hot or using too much power. Diagnostic Diagnose
B3A05 The car's air conditioning system has a part that helps control where the cold air goes. This part is stuck and not working right, so the air conditioning might not cool properly. Diagnostic Diagnose
B3A06 This code means there's a problem with the part of the car that controls how the air conditioner spreads cool air. It's like a switch that isn't working right, so the air might not be as cool as it should be. Diagnostic Diagnose
B3A07 This code means there's a problem with a part of the car's air conditioning system that helps control where the cold air goes. It's like a switch isn't working right, so the air might not get as cold as it should. Diagnostic Diagnose
B3A08 This code means there's a problem with the part of your car's air conditioning system that controls how the cool air is spread around. It's like a switch that isn't working right, so the air might not be as cold as it should be. Diagnostic Diagnose
B3A09 This code means that a part of the car's air conditioning system is getting too hot or using too much power. It's like when a toy gets too hot and stops working because it's using too many batteries. Diagnostic Diagnose
B3A0A The part of your car that helps control the air conditioning is not working properly. It's like a door that should open and close to let the cold air in, but it's stuck. Diagnostic Diagnose
B3A0B This code means that there is a problem with the part of the car's air conditioning system that controls how much cold air comes out. It's like if the remote control for your TV stopped working, so you couldn't change the channel. Diagnostic Diagnose
B3A0C This code means that the part of the car that controls how cold air comes out of the air conditioner isn't working right. It's like when a faucet can't open properly to let water flow; here, the car can't adjust the cold air flow correctly. Diagnostic Diagnose
B3A0D This code means there's a problem with the part of the car's air conditioning that controls how much cold air comes out. It's like when a water tap is stuck and can't adjust the flow of water. Diagnostic Diagnose
B3A0E This code means there's a problem with the part of your car's air conditioning system that controls how much cold air comes out. It's getting too hot or using too much power. Diagnostic Diagnose
B3A0F The car's air conditioner isn't cooling as well as it should because the part that helps release heat isn't working properly. Diagnostic Diagnose
B3A10 This code means that the part of the car that helps keep the air conditioner cool is working too hard or too efficiently. It's like when a fan is blowing too much air when you only need a little breeze. Diagnostic Diagnose
B3A11 This code means there's a problem with the part of the car that controls how the air conditioner cools the air. It's like a switch that isn't working right, so the air might not get as cold as it should. Diagnostic Diagnose
B3A12 This code means that the part of your car that helps control the air conditioning system isn't working right. It's like when a toy doesn't work because its battery is too weak. Diagnostic Diagnose
B3A13 This code means there's a problem with the part of the car that helps control how the air conditioning distributes cold air. It's like a switch that isn't working right, so the cold air might not be going where it's supposed to. Diagnostic Diagnose
B3A14 This code means that a part of the car that helps control the air conditioning isn't working right. It's like when a toy has a stuck button and doesn't do what it's supposed to. Diagnostic Diagnose
B3A15 This code means there's a problem with a part of your car's air conditioning system that helps control how cold air is spread around. It's like a switch that isn't working right, so the cold air might not be going where it should. Diagnostic Diagnose
B3A16 This code means that the part of the car that helps control the air conditioning might not be working properly. It's like when a toy robot's arm doesn't move the way it's supposed to. Diagnostic Diagnose
B3A17 This code means there's a problem with the part of the car that controls how the air conditioner spreads cold air. It's like when a fan in your house isn't working right and doesn't blow air where it's supposed to. Diagnostic Diagnose
B3A18 This code means there's a problem with a part of the car's air conditioning system that helps control where the cold air goes. It's not working as it should. Diagnostic Diagnose
B3A19 This code means there's a problem with the part of your car that controls where the cold air goes. It's like when a toy car's steering wheel doesn't work right, so it can't turn properly. Diagnostic Diagnose
B3A1A This code means there's a problem with a part of the car's air conditioning system that helps control the temperature. It's like a valve that isn't working right, so the car might not cool down properly. Diagnostic Diagnose
B3A1B This means that the air conditioning system in the car is feeling too much pressure, like a balloon that's being blown up too much. It might stop working properly to keep you cool. Diagnostic Diagnose
B3A1C The air conditioning in your car is getting too hot, which means it might not be cooling the car properly. Diagnostic Diagnose
B3A1D This code means there's something wrong with the second battery charger in the car. It's like when your phone charger isn't working right. Diagnostic Diagnose
B3A1E This code means there's a problem with the way the car's battery charger is connected to the ground. It's like if a toy's battery wasn't connected properly, so it can't work right. Diagnostic Diagnose
B3A1F This code means that there's a problem with the ground connection of the second battery charger in your car. It's like when a toy doesn't work because the battery isn't properly connected. Diagnostic Diagnose
B3A20 This code means that the computer in your car found a problem with a part that helps the car move through the air better. It's like having a toy car with a broken wing that makes it go slower or not as smoothly. Diagnostic Diagnose
B3A21 This code means there's a problem with a part of the car that helps it move through the air better. It's like the car's wings aren't working right. Diagnostic Diagnose
B3A22 This code means there's a problem with a part of the car that helps it move through the air better. It's like a small computer that controls how the car's body changes shape to go faster or use less fuel. Diagnostic Diagnose
B3A23 This code means there's a problem with a part of the car that helps it move through the air better, like a spoiler that adjusts itself. It's like if a toy car's wing got stuck and couldn't move the way it's supposed to. Diagnostic Diagnose
B3A24 This code means that a part of the car that helps it move through the air better is getting too much electricity. Diagnostic Diagnose
B3A25 The car's computer is having trouble getting enough power to a part that helps the car move through the air better. Diagnostic Diagnose
B3A26 This code means there's a problem with the car's system that controls parts that help the car move through the air better. It's like when a toy with moving parts doesn't work because its battery isn't connected properly. Diagnostic Diagnose
B3A27 This code means there's a problem with the part of the car that controls how it moves through the air, like a spoiler. It's not getting the right power it needs to work. Diagnostic Diagnose
B3A28 This code means there's too much electricity going to a part of the car that helps it move through the air better. Diagnostic Diagnose
B3A29 This code means that a part of the car that helps it move smoothly through the air isn't getting enough power. Diagnostic Diagnose
B3A2A This code means there's a problem with the car's system that controls parts that help it move through the air better. It's like when a toy car's wing doesn't move because the battery is disconnected. Diagnostic Diagnose
B3A2B This code means there's a problem with the car's system that controls parts that help it move through the air better, like a spoiler. It's like when a toy car's wings don't move because the remote isn't working right. Diagnostic Diagnose
B3A2C This code means that the computer in the car found a problem with the part that helps the car move through air better. It thinks there's too much electricity going to it. Diagnostic Diagnose
B3A2D This code means that a part of the car that helps it move through the air better isn't getting enough power. Diagnostic Diagnose
B3A2E This code means there's a problem with the car's system that controls parts that help the car move through air better, like a spoiler. It's like a toy with a part that won't move because the battery is not connected right. Diagnostic Diagnose
B3A2F This code means there's a problem with the part of the car that helps it move through the air better. It's like a special robot part that isn't working right. Diagnostic Diagnose
B3A30 This code means that a part of the car that helps it move through the air more easily is getting too much power. It's like when a toy gets too much battery power and doesn't work right. Diagnostic Diagnose
B3A31 This code means that a part of the car that helps it move through the air better isn't getting enough power. It's like when a toy car's battery is low, and it can't go as fast. Diagnostic Diagnose
B3A32 This code means there's a problem with the car's system that controls how the car moves through the air. It's like when a toy's remote control isn't working properly. Diagnostic Diagnose
B3A33 This code means there's a problem with the car's system that controls how the air moves around the car to make it go faster or use less fuel. It's like when a toy car's wings don't work right. Diagnostic Diagnose
B3A34 The car has a special part that helps it move through the air better. This part has a sensor that hasn't learned how to work properly yet. Diagnostic Diagnose
B3A35 This code means that a part of the car that helps it move through the air better isn't working right. It's like a little wing on the car that helps it go faster and use less fuel, but it's not doing its job. Diagnostic Diagnose
B3A36 The car has a part that helps it move through the air better, and there's a sensor checking its temperature. This sensor is saying something that doesn't make sense. Diagnostic Diagnose
B3A37 The car has a special part that helps it move through the air more easily. This part is getting too hot. Diagnostic Diagnose
B3A38 The car's system that helps it move through the air more easily is too cold to work properly. Diagnostic Diagnose
B3A39 This means that a part of the car that helps it move smoothly through the air isn't in the right position, and the car's computer doesn't understand why. Diagnostic Diagnose
B3A3A This code means that a part of the car that helps it move through the air better is not working right. It's like a wing on a plane that helps it fly smoothly, but it's not in the right position. Diagnostic Diagnose
B3A3B This code means that a sensor that helps control a part of the car that changes shape to improve how it moves through the air is not getting enough power. It's like a toy that doesn't work because the batteries are low. Diagnostic Diagnose
B3A3C This code means that a sensor which helps the car change its shape to move better through the air is getting too much electricity. Diagnostic Diagnose
B3A3D This code means that a part of the car that helps it move through the air better isn't working right because a sensor isn't getting enough power. Diagnostic Diagnose
B3A3E This code means there's a problem with the part of the car that helps it move through the air better. It's like when a toy car's spoiler doesn't work right, making it slower. Diagnostic Diagnose
B3A3F The car's special moving parts that help it go faster or use less fuel don't know where they are supposed to be. It's like a toy robot that forgot how to move its arms. Diagnostic Diagnose
B3A40 The car has a special part that helps it move through the air better, like a wing. This part has a sensor that checks if it's too hot, and the sensor is saying something that doesn't make sense. Diagnostic Diagnose
B3A41 This means that a part of the car that helps it move through the air better is getting too hot. Diagnostic Diagnose
B3A42 This code means that a part of the car that helps it move through the air more easily is too cold to work properly. Diagnostic Diagnose
B3A43 The car has a part that changes shape to help it move better, like a wing. This part isn't in the right spot, and the car's computer is confused. Diagnostic Diagnose
B3A44 This code means that the car's computer has detected a problem with a sensor that helps control parts of the car that change shape to make it go faster or use less fuel. The sensor is getting too much electricity. Diagnostic Diagnose
B3A45 This code means that a sensor that helps control a part of the car that changes shape to help with airflow is not getting enough power. Diagnostic Diagnose
B3A46 This code means that a sensor that helps control a part of the car that moves to make it more aerodynamic is getting too much electrical power. Diagnostic Diagnose
B3A47 This code means that a sensor that helps control a part of the car that moves to make it more aerodynamic is not getting enough power. Diagnostic Diagnose
B3A48 This code means that a part of the car that helps it move through the air better isn't working right. It's like a robot arm on the car that isn't moving the way it's supposed to. Diagnostic Diagnose
B3A49 The car has a part that helps it move through the air better, and it has a sensor to know where it is. This sensor hasn't learned its position yet. Diagnostic Diagnose
B3A4A The car has a special part that helps it move through the air better, and this part is getting too hot or cold when it shouldn't be. Diagnostic Diagnose
B3A4B The car has a part that helps it move through the air better, and this part is getting too hot. Diagnostic Diagnose
B3A4C This code means that a part of the car that helps it move through the air better is too cold to work properly. Diagnostic Diagnose
B3A4D The car has a special part that moves to help it go faster or save fuel, and it isn't in the right place. Diagnostic Diagnose
B3A4E This code means that a sensor that helps control a part of the car that moves to make it more aerodynamic is getting too much electrical power. Diagnostic Diagnose
B3A4F This code means that a sensor in the car that helps control parts that move to make the car go faster or slower is not getting enough power. Diagnostic Diagnose
B3A50 This code means there's a problem with a sensor that helps control a part of the car that changes shape to help it go faster or use less fuel. The sensor is sending too much electricity. Diagnostic Diagnose
B3A51 This code means there's a problem with a sensor that helps control a part of the car that moves to make it go faster or use less fuel. The sensor isn't getting enough power. Diagnostic Diagnose
B3A52 This code means that a part of the car that helps it move through the air better isn't working right. Imagine if a toy car had a wing on it to make it go faster, but the wing was stuck or broken. Diagnostic Diagnose
B3A53 This code means that the car's computer doesn't know where a special part that helps with the car's shape and speed is located. It's like the car forgot where it put its hat. Diagnostic Diagnose
B3A54 The car has a special part that helps it move through the air better. This part has a sensor that checks how hot it gets. Right now, the sensor is saying something that doesn't make sense, like if a thermometer said it was both hot and cold at the same time. Diagnostic Diagnose
B3A55 This means a part of the car that helps it move through the air more easily is getting too hot. Diagnostic Diagnose
B3A56 This code means that a part of the car that helps it move through the air better is too cold. It's like when your hands are too cold to move well. Diagnostic Diagnose
B3A57 The car has a special part that changes shape to help it move better, like a wing. This code means the car's computer thinks that part isn't in the right place. Diagnostic Diagnose
B3A58 This code means there's a problem with a sensor that helps control a part of the car that changes shape to help it move better. The sensor is getting too much electricity. Diagnostic Diagnose
B3A59 This code means that a sensor that helps control a part of the car that moves to make it more aerodynamic is not getting enough power. Diagnostic Diagnose
B3A5A This code means that a sensor in your car that helps control parts that change shape to make your car go faster or use less fuel is getting too much electricity. Diagnostic Diagnose
B3A5B This code means that a part of your car that helps it move through the air smoothly isn't working right because a sensor isn't getting enough power. Diagnostic Diagnose
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