What is the problem when the EPC light is on and the diesel car cannot accelerate?

1 Answers
MayaAnn
07/29/25 10:44pm
EPC light illumination is generally caused by the following reasons: 1. Dirty throttle body: The EPC light mainly illuminates due to a dirty throttle body. This issue can be resolved by cleaning the throttle body and then performing a recalibration. 2. Leakage in the intake system: This causes the engine control unit to detect the problem and illuminate the EPC warning light. Restarting the engine can solve this issue. Additional information: There are only two faults when the EPC light is on: 1. Damaged brake light switch. 2. Improper installation or adjustment of the throttle position sensor, causing the idle switch not to close when the throttle is fully closed, or the idle switch remaining closed when the throttle is partially open.
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