Is it serious when the EPC light is on in a JAC?
2 Answers
The EPC light being on in a JAC is serious. In fact, when the EPC light in a car is on, it means the vehicle's malfunction indicator light is illuminated, indicating an abnormality in the engine's power control system. This is usually due to a dirty throttle body, which should be cleaned in such cases. Another possible reason is that the brake lights are not working, requiring a visit to a specialized repair shop to check for any brake system faults. Clutch Damage: It could also be due to clutch damage, a situation more common in manual transmission vehicles. Similar to brake failure, if there's an issue with the brakes, the clutch may also show abnormalities. EPC Indicator Light: Also known as the engine management system malfunction light. In the past, drivers would control the accelerator pedal based on the engine's power demand. This pedal would control the throttle via a cable. In the EPC system, the traditional cable is replaced by a pedal sensor. The ECU uses this device to receive position feedback data, performs precise calculations to determine the optimal throttle opening, and then sends a signal to the throttle, driving the motor to rotate the throttle to an appropriate angle.
I'm quite knowledgeable about cars, and an illuminated EPC light is no small matter. It indicates a malfunction in the Electronic Power Control system, meaning the engine management is out of order. Generally, this light comes on due to a dirty throttle body, faulty sensors, or electrical issues, all of which can cause poor acceleration, sudden stalling, and pose serious risks especially at high speeds. I've encountered many cases while repairing cars where ignoring it could affect engine longevity and lead to unnecessary repair costs. So, I recommend immediately finding a safe place to stop—don't push through—then using a diagnostic tool to read the trouble codes and identify the specific issue. It's best to visit a professional shop for a thorough check to prevent minor issues from escalating. During regular maintenance, remember to clean the throttle body to keep the system functioning properly, reducing the chances of unexpected problems.
