What causes the EPC light to come on in a JAC car and how to solve it?
2 Answers
JAC EPC light comes on and the car cannot move. The reasons and solutions are as follows: 1. Excessive carbon buildup in the throttle: Too much carbon buildup in the car's throttle affects the car's power. Solution: Clean it promptly to reduce fuel consumption. 2. Brake light switch failure: Poor contact or failure of the car's brake light switch causes the EPC light to come on. Solution: Repair it promptly to prevent safety hazards. 3. Intake system leakage: Leakage in the intake system affects the normal combustion of fuel in the engine. Solution: Contact a repair shop for immediate repair. 4. Engine overheating: Overheating of the engine affects its lifespan. Solution: Turn off the vehicle and lower the temperature to normal levels.
When repairing cars, I often encounter Jianghuai vehicles with the EPC light on and unable to move, the issue usually lies in the electronic throttle control system. The most common causes are severe carbon buildup in the throttle or mechanical jamming, preventing the engine from responding to throttle signals; or sensors like the throttle pedal position sensor failing, leading to inaccurate signals; loose wiring harness connectors or corrosion due to moisture can also interfere with the current. Additionally, ECU software bugs can trigger faults. The solution is not to force the car to run but to find a safe place to pull over immediately, then use an OBD scanner to read the fault codes and identify the specific source. If the throttle is dirty, cleaning it often works; if a sensor is faulty, try replacing it; for wiring harness issues, tighten or replace the connectors. If these don’t work, take it to a 4S shop for professional inspection. Regular maintenance like cleaning the intake tract and checking wiring can reduce recurrence. In short, safety comes first—delaying repairs carries too much risk.
