What Are the Symptoms of a Faulty Car Computer?

[DeLouis]

Symptoms of a faulty car computer are specifically introduced as follows: Engine warning light stays on: If no faults are found in other engine hardware components but the warning light remains illuminated, the computer board should be checked. Difficulty starting the engine: Since the car computer is responsible for increasing fuel injection during startup, a faulty computer may result in a lower concentration of the combustible air-fuel mixture, making it difficult to start the vehicle. Internal program malfunction: The fuel injection volume, ignition timing, transmission shift logic, etc., may all be affected. If the vehicle experiences poor performance or fails to ignite, the computer board should be inspected for damage. Abnormal vehicle operation: The engine may suddenly stall and become difficult or impossible to restart. Methods to diagnose a faulty car computer: If the car computer is damaged, the vehicle may exhibit abnormal display brightness, inability to lock or unlock, failure to ignite, unstable idling, increased fuel consumption, and other issues. Functions of the car computer: The car computer can calculate real-time fuel consumption, driving distance, temperature, average speed, average fuel consumption, etc. Some models also feature maintenance reminders and driver rest alerts. The car computer has a small screen on the dashboard or center console that displays the above information for the driver's reference. The car computer continuously monitors the engine's operating conditions to check for excessive exhaust emissions. If emissions exceed standards, it will immediately issue a warning. When a fault occurs, the warning light or check engine light will illuminate, and the powertrain control module will store the fault information. The fault code can be retrieved from the powertrain control module using specific procedures. Based on the fault code, mechanics can quickly and accurately identify the nature and location of the fault.