What are car error codes?
3 Answers
Car fault codes are error codes reflected by the vehicle's computer ECU after a malfunction occurs. Generally, fault codes are caused by sensor malfunctions or poor sensor performance, but some mechanical faults cannot be read by the ECU. Examples of fault codes: P0107: Intake pressure sensor input voltage too low; P0108: Intake pressure sensor input voltage too high; P0109: Intake temperature sensor circuit malfunction or intermittent intake pressure sensor circuit; P0110: Intake temperature sensor circuit intermittent fault; P0111: Intake temperature sensor wiring malfunction; P0112: Intake temperature sensor circuit voltage too low; P0113: Intake temperature sensor circuit input voltage too high; P0114: Intake temperature sensor circuit intermittent fault; P0115: Engine coolant temperature sensor circuit malfunction; P0116: Engine coolant temperature sensor malfunction; P0117: Engine coolant temperature sensor voltage too low; P0118: Engine coolant temperature sensor voltage too high.
Last time I was driving, the check engine light came on and displayed a P0420 error code, which really startled me. Car error codes are essentially small tags recorded by the vehicle's computer system when it detects a fault. For example, P0420 indicates an issue with the catalytic converter in the exhaust system. If you ignore it, it could lead to increased fuel consumption or even engine damage, resulting in expensive repair costs later. I immediately went to a repair shop for inspection, and it turned out the catalyst efficiency was low—a simple cleaning fixed it. These codes follow a standardized design: P stands for powertrain issues, C for chassis faults, etc. Vehicles produced after 1996 support the OBD-II interface, so you can spend a few dozen dollars on a scan tool to read the codes yourself, saving both time and money. I recommend car owners pay regular attention to these small alerts, especially when lights flash, and stop to address them immediately. Learning some basic knowledge can help you stay calm when facing unexpected situations.
Car trouble codes may sound technical, but they're essentially diagnostic markers left by the vehicle's onboard system. When a component malfunctions, the computer records a code - for instance, P0301 indicates a cylinder misfire. These codes fall into different categories: P represents engine and powertrain issues, C relates to chassis problems, and B denotes body-related faults. Most modern vehicles use the OBD-II system, standardized since 1996 for greater convenience. A simple tool connected to the port can read them; common issues include sensor fault codes like P0130, indicating oxygen sensor voltage problems. Don't panic when the warning light appears - it might just be a loose connection or blown fuse. If the light persists after clearing the code, professional repair is needed. Understanding these basics helps you drive with greater peace of mind.
