Common Types of Trouble Codes

There are several common types of trouble codes that you may come across when reading diagnostic trouble codes (DTCs) from your vehicle's onboard computer system. Here are some examples:

P0xxx codes (Powertrain Codes): These codes relate to issues within the powertrain, which includes the engine, transmission, and drivetrain. Examples include:

P0300: Random/Multiple Cylinder Misfire Detected

P0420: Catalyst System Efficiency Below Threshold (Bank 1)

P1xxx codes (Manufacturer-Specific Codes): These codes are specific to certain vehicle manufacturers and can vary in their meaning and interpretation. Examples include:

P1000: Manufacturer-Specific DTC (Ford)

P1705: Transmission Range Sensor Circuit Malfunction (Toyota)

B0xxx codes (Body Codes): These codes are related to issues within the body control module or body systems of the vehicle. Examples include:

B0020: Occupant Restraint System Car Trouble Codes Deployment Control (Subfault)

B1011: EEPROM Checksum Error

C0xxx codes (Chassis Codes): These codes pertain to issues within the chassis systems of the vehicle, such as the ABS (anti-lock braking system) or suspension. Examples include:

C1234: Right Rear Wheel Speed Circuit Open or Shorted

C0561: Electronic Stability Control (ESC) System Disabled

U0xxx codes (Network Communication Codes): These codes relate to issues within the network communication systems of the vehicle, such as CAN (Controller Area Network) bus communication problems. Examples include:

U0100: Lost Communication with ECM/PCM

U0140: Lost Communication with Body Control Module

It's important to note that these are just a few examples, and there are numerous other trouble codes that can be specific to different vehicle makes, models, and systems. Each trouble code provides information about a particular issue or malfunction, and further diagnosis and troubleshooting are necessary to determine the exact cause and appropriate repair steps.

When you encounter a trouble code, consulting the specific code's description, possible causes, and recommended troubleshooting steps can help guide you in resolving the issue effectively.