What are the car fault symbols?

[LaJude]

Fault codes consist of five characters, with the first being a letter followed by four Arabic numerals. The second character in the fault code indicates the category. Fault codes beginning with 'P0×××' are ISO-standard controlled codes (e.g., P0099), which are the same across all car manufacturers and are predetermined by ISO/ASE. The P0100 series codes relate to fuel and air metering. The P0200 series codes also pertain to fuel and air metering. The P0300 series codes are associated with the ignition system and misfire conditions. The P0400 series codes concern auxiliary emission control systems. The P0500 series codes are related to vehicle speed, idle control systems, and auxiliary inputs. The P0600 series codes involve internal control unit faults or dedicated circuits connecting the control unit with other control modules in a multiplex communication system. The P0700 series codes pertain to transmission control functions. The P0800 series codes also relate to transmission control functions. The last two digits of the code refer to specific subsystems with their own diagnostic procedures. For example, P0115 specifically indicates the engine coolant temperature sensor. Some P0200 and P0300 series codes use the last two digits to identify the specific engine cylinder where the fault was detected. For instance, P0300 indicates multiple cylinder misfires, P0301 indicates a misfire in cylinder 1, P0302 indicates a misfire in cylinder 2, and so on. Another example is P0200, which indicates an open circuit in the fuel injector circuit, P0201 indicates an open circuit in cylinder 1's fuel injector circuit, P0202 indicates an open circuit in cylinder 2's fuel injector circuit, P0203 indicates an open circuit in cylinder 3's fuel injector circuit, P0206 indicates an open circuit in cylinder 6's fuel injector circuit, P0211 indicates an open circuit in cylinder 11's fuel injector circuit, P0212 indicates an open circuit in cylinder 12's fuel injector circuit, etc. Fault codes beginning with 'P1×××' are manufacturer-controlled codes (e.g., P11××, which car manufacturers control for fuel and air flow). These are predetermined by the car manufacturer and may be manufacturer-specific, but they are still standard codes. Fault codes beginning with 'P2×××' are also standard fault codes, falling under standardized (SAE/ISO) categories and specific manufacturer codes. Some are reserved by ISO or SAE, while others are already published fault codes.

[April]

Car warning symbols are those small icons on the dashboard that light up to alert you to vehicle issues. I remember the first time I drove and saw the engine light come on—I panicked and immediately flipped through the manual to check. Common symbols include the engine light (indicating possible fuel injector blockage or sensor failure), ABS light (braking system problem), oil pressure light (low oil level or leakage), tire pressure light (low tire pressure), and battery light (charging system abnormality). Every car's manual provides detailed explanations—don't ignore it. Minor issues like low tire pressure can be fixed by inflating the tires yourself, but if the engine light comes on, it's best to visit a repair shop to scan for trouble codes. I once encountered a flashing oil pressure light in a friend's car, which turned off after refilling the oil, teaching me to regularly check fluid levels. For safety, if a light comes on, slow down or stop without hesitation.

[LailaDella]

Having driven for decades, I never panic when a warning light comes on. I start with basic checks: a loose gas cap might trigger the engine light, so I try resealing it; for the ABS light, I gently test the brakes; tire pressure warnings are common in winter due to uneven expansion. Most issues are simple, but if you're unsure, don't force it—I always advise against DIY part removal to avoid major mistakes. Another lesson: a flashing battery light signals alternator or battery aging—I've replaced mine twice to prevent breakdowns. Pro tip: regular maintenance reduces warning symbols. My 5,000-km oil changes and filter checks prevent many issues. Modern smart cars even allow phone diagnostics, which is handy, but never distract yourself while driving in emergencies.

[LaSteven]

When those small lights illuminate, the core issue is the vehicle's computer signaling an alert. For example, the engine symbol often lights up due to uneven fuel mixture or damaged spark plugs, and using an OBD tool to read the codes can pinpoint the issue. If the ABS symbol stays on persistently, it might indicate dirty sensors that need cleaning. The oil pressure warning light signals insufficient lubrication, risking bearing damage. I've handled many cases, including a false tire pressure alert caused by not resetting the system after a tire change. During diagnosis, always check the wiring connections, as loose contacts are the most common issue. Professional repair shops can quickly fix these with a multimeter test, but ignoring them could lead to engine failure. Simply put, these symbols are the car's cry for help—addressing them early saves money.

[DeNevaeh]

Warning symbols are matters of life and death—never take them lightly. For example, driving with the engine light on may lead to a breakdown; ABS failure can cause skidding and accidents in rainy conditions. I once witnessed a friend ignore the oil pressure light, only for the engine to smoke and seize. Low tire pressure risks a high-speed blowout, while a weak battery can disable electronic controls. When a symbol lights up, immediately slow down, pull over, and turn off the engine to cool. If you can't resolve it yourself, call for assistance. For prevention, I regularly wash my car to prevent circuit oxidation and short circuits, and I always check all gauges before long trips. One moment of neglect can come at a high cost—I've learned that timely action is key to staying safe.