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🔧 C Codes Directory

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

📋 All C Codes (761 codes)

Code Plain-language meaning Type Action
C1220 The car's computer thinks the left front wheel is spinning too fast compared to the other wheels. Diagnostic Diagnose
C1221 This code means that the car's computer thinks the right front wheel is spinning much faster than it should be. It's like when one wheel on your toy car spins faster than the others, which can make the car go off track. Diagnostic Diagnose
C1222 The car's computer thinks the left back wheel is spinning faster than it should be. It's like when one wheel on your toy car spins much faster than the others. Diagnostic Diagnose
C1223 This code means there's a problem with the circuit that tells the brake warning light to turn on in your car. Diagnostic Diagnose
C1224 This code means there's a problem with the connection that tells your car's dashboard to show the brake warning light. It's like when a light switch doesn't work because the wire is broken. Diagnostic Diagnose
C1225 This code means there's a problem with the brake warning light in your car. It's like when a light bulb in your house stays on even if you switch it off because the wires are crossed. Diagnostic Diagnose
C1226 This code means that there's a problem with the car's brake warning light system. It's like a flashlight that is supposed to tell you something important, but it's not working right because the wires are touching something they shouldn't. Diagnostic Diagnose
C1227 The car's computer thinks the right rear wheel's speed sensor isn't put together correctly. It's like if a toy's wheel wasn't attached right, so it doesn't spin properly. Diagnostic Diagnose
C1228 The car's computer is getting confusing information from the wheel speed sensor, which helps it know how fast the wheels are spinning. Diagnostic Diagnose
C1229 This code means there's a problem with the sensor that tells the car how fast the left front wheel is spinning. It's like when your bike's speedometer stops working because the wire is loose. Diagnostic Diagnose
C122A This code means there's a problem with the sensor that tells the car how fast the right front wheel is spinning. It's like when your bike's speedometer isn't working right. Diagnostic Diagnose
C122B The car's computer is having trouble getting a signal from the sensor that tells how fast the left back wheel is spinning. It's like when your game controller isn't connected properly to your console. Diagnostic Diagnose
C122C This code means there's a problem with the sensor that tells the car how fast the right rear wheel is spinning. It's like a broken speedometer for that wheel. Diagnostic Diagnose
C122D This code means that the car's computer is having trouble reading the speed of the left front wheel. It's like when your bicycle speedometer stops working and you can't tell how fast you're going. Diagnostic Diagnose
C122E This code means there's a problem with the sensor that tells the car how fast the right front wheel is spinning. It's like when your bicycle's speedometer stops working. Diagnostic Diagnose
C122F This code means that the car's computer is getting a signal that the power going to the wheel speed sensor is too high. It's like when you plug in a lamp and it gets too much electricity. Diagnostic Diagnose
C1230 The car's computer is confused about which way the front left wheel is spinning. It's like when you can't tell if a fan is blowing air towards you or away from you. Diagnostic Diagnose
C1231 The car's computer is confused about how the right front wheel is spinning. It thinks the wheel is going the wrong way, which doesn't make sense. Diagnostic Diagnose
C1232 The car is confused about which way the back left wheel is turning. Diagnostic Diagnose
C1233 This code means that the car's computer is confused about how the right rear wheel is turning. It's like when you spin a toy wheel and it doesn't know which way it's going. Diagnostic Diagnose
C1234 This code means that the car's computer is confused about which way the wheels are spinning. It's like when you can't tell if a fan is spinning forwards or backwards. Diagnostic Diagnose
C1235 The car's computer is having trouble understanding the signal from the left front wheel's speed sensor. It's like when you can't read a friend's messy handwriting. Diagnostic Diagnose
C1236 The car's computer thinks the right front wheel is spinning at a speed that doesn't make sense, like if it thinks the wheel is going faster or slower than it really is. Diagnostic Diagnose
C1237 The car's computer is getting confusing signals from the sensor on the left back wheel, which helps it know how fast the wheel is turning. Diagnostic Diagnose
C1238 The car's computer is saying that something is wrong with the part that checks the pressure in the brakes. It's like a warning light for your brakes. Diagnostic Diagnose
C1239 The car's computer is saying that it can't talk to a part that checks the brakes. It's like trying to call your friend, but the phone line is broken. Diagnostic Diagnose
C123A This code means that the car's computer is having trouble reading the speed of the right rear wheel. It's like when your bicycle's speedometer stops working because the sensor is dirty or broken. Diagnostic Diagnose
C123B The car's computer thinks the left front wheel is spinning way too fast compared to the other wheels. It's like when you spin one wheel of your toy car really fast, but the others are going slower. Diagnostic Diagnose
C123C The car's computer is getting a signal from the right front wheel that is too strong. It's like the wheel is shouting when it should just be talking normally. Diagnostic Diagnose
C123D The car's computer is getting a signal from the left back wheel that is too strong, kind of like the wheel is spinning way faster than it should be. Diagnostic Diagnose
C123E The car's computer is getting a signal from the right rear wheel that is too strong, like it's spinning way too fast. Diagnostic Diagnose
C123F The car's computer thinks the left front wheel sensor is not working right because it's getting strange signals. Diagnostic Diagnose
C1240 This means there's a problem with the car's brake system. It's like a wire is touching something it shouldn't, causing the brakes to act funny. Diagnostic Diagnose
C1241 This code means there's a problem with the car's braking system. It's like a wire that helps the brakes talk to the car's computer is not working right. Diagnostic Diagnose
C1242 The car's computer is having trouble understanding the speed of the right rear wheel because the information it's getting doesn't make sense. Diagnostic Diagnose
C1243 This code means that there's a problem with the car's ability to read how fast the wheels are spinning. It's like when your bike's speedometer stops working because the sensor isn't getting power. Diagnostic Diagnose
C12A0 The car's computer that helps control how power is sent to the wheels has a memory problem. It's like when your video game console can't save your progress because something is wrong with the memory card. Diagnostic Diagnose
C12A1 The car's computer that helps control the part that changes how the wheels turn is having trouble doing its job. Diagnostic Diagnose
C12A2 This code means that the computer that controls the part of the car that switches between two-wheel drive and four-wheel drive is having trouble keeping track of what's happening. Diagnostic Diagnose
C12A3 The car's computer that controls the part of the car that switches between two-wheel drive and four-wheel drive has the wrong settings. Diagnostic Diagnose
C12A4 The car's computer can't find the right information to talk to a part that helps the car switch between two-wheel and four-wheel drive. Diagnostic Diagnose
C12A5 This code means that the computer in your car found a problem with the part that helps the car switch between different driving modes, like 2-wheel drive and 4-wheel drive. Diagnostic Diagnose
C12A6 This code means that the computer in charge of controlling the part of the car that switches between two-wheel and four-wheel drive needs to be adjusted or reset. Diagnostic Diagnose
C12A7 This code means that the computer that controls the part of the car that switches between 2-wheel and 4-wheel drive has a problem with its settings. Diagnostic Diagnose
C12A8 This code means there's a problem with the power supply to a part of the car that helps it switch between different driving modes, like 2-wheel drive and 4-wheel drive. Diagnostic Diagnose
C12A9 This code means that there's a problem with the power supply to the part of the car that helps it switch between two-wheel and four-wheel drive. Diagnostic Diagnose
C12AA This code means that the computer in your car that controls the part that helps switch between two-wheel and four-wheel drive is using too much electricity. Diagnostic Diagnose
C12AB The computer that helps your car switch between two-wheel drive and four-wheel drive is getting too hot. Diagnostic Diagnose
C12AC This code means there's a problem with the sensor that checks the temperature of a part in the car that helps it switch between two-wheel and four-wheel drive. It's like a thermometer that's not working right. Diagnostic Diagnose
C12AD This code means that the computer that controls the part of the car that switches between two-wheel drive and four-wheel drive is having trouble thinking or working properly. Diagnostic Diagnose
C12AE This code means there's a problem with the sensor that tells the car's computer what position the transfer case is in. The transfer case is a part that helps your car switch between different driving modes, like two-wheel drive and four-wheel drive. Diagnostic Diagnose
C12AF This code means there's a problem with the computer that controls the part of the car that switches between two-wheel and four-wheel drive. Diagnostic Diagnose
C12B0 This code means that there is a problem with the part of the car that helps switch between two-wheel drive and four-wheel drive. It's like when a toy's switch doesn't work properly. Diagnostic Diagnose
C12B1 This code means there's a problem with the part of the car that helps switch between different driving modes, like 4-wheel drive. It's like a switch in a toy car that's not working right. Diagnostic Diagnose
C12B3 This code means there's a problem with the part of the car that helps it switch between two-wheel drive and four-wheel drive. It's like when a toy's switch gets stuck and can't change modes. Diagnostic Diagnose
C12B4 This code means there's a problem with the part of the car that helps switch between two-wheel and four-wheel drive. It's like a switch that isn't working right. Diagnostic Diagnose
C12B5 This code means that a part in the car that helps the wheels turn is getting worn out and might need to be fixed or replaced. Diagnostic Diagnose
C12B6 This code means that the computer in the car is having trouble matching the transfer case, which helps the car switch between two-wheel and four-wheel drive, with the car's unique ID number. Diagnostic Diagnose
C12B7 This code means there's a problem with the part of the car that helps switch between different driving modes, like 2-wheel drive and 4-wheel drive. Diagnostic Diagnose
C1500 This code means there's a problem with a part of your car that helps switch between different driving modes, like 2-wheel drive and 4-wheel drive. It's like a light switch not working properly. Diagnostic Diagnose
C2000 This code means there's a problem with the car's brake booster, which helps you stop the car easily. It's like when a bike's brakes don't work well, and you have to press harder to stop. Diagnostic Diagnose
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