Why does the EPC warning light come on and the Jetta can't accelerate?
2 Answers
The EPC warning light coming on and the Jetta being unable to accelerate is caused by an engine fault, usually due to a throttle or wiring harness issue. It is essential to repair this problem promptly. Taking the 2019 Jetta VS5 280TSI manual base model as an example, its dimensions are 4419mm in length, 1841mm in width, and 1616mm in height, with a wheelbase of 2630mm. The curb weight is 1310kg, and the body structure is a 5-door, 5-seat SUV. In terms of power, it is equipped with a 1.4T turbocharged engine, with a maximum power of 110kW and a maximum torque of 250Nm, paired with a 5-speed manual transmission.
The EPC warning light is on in the old car, and it can't accelerate. I suspect it's an issue with the electronic system. For older models like the Jetta, an illuminated EPC light usually indicates a fault in the electronic throttle control system. Possible causes include a faulty throttle pedal sensor or a dirty, stuck throttle body. When you press the accelerator and there's no response, the system mistakenly thinks the throttle isn't opening, thus limiting power output. Check the fuse box to see if the EPC-related fuse is blown or if the sensor connector is loose or corroded. Aging wiring in older cars is also a common factor, which may cause signal interruptions. It's best to pull over as soon as possible and use an OBD scanner to read the trouble codes for accurate diagnosis. If you don't have the equipment, take it directly to a professional repair shop to avoid the risk of breaking down on the road. Regular maintenance, such as cleaning the throttle body, can help prevent such issues.
