Browse
For Sale
Antiques CollectiblesApparelBaby Kids ItemsBooks， Movies And MusicElectronicsFree StuffGarden OutdoorHealth BeautyHome GoodsHome Improvement SuppliesMusical InstrumentsOffice SuppliesPet SuppliesSporting GoodsTicketToys GamesTransportationOthers
Jobs
AccountingAdministration & Office SupportAdvertising， Arts & MediaBanking & Financial ServicesCall Center & Customer ServiceCEO & General ManagementCommunity Services & DevelopmentConstructionConsulting & StrategyDesign & ArchitectureEducation & TrainingEngineeringFarming， Animals & ConservationGovernment & DefenseHealthcare & MedicalHospitality & TourismHuman Resources & RecruitmentInformation & Communication TechnologyInsuranceLegalManufacturing， Transport & LogisticsMarketing & CommunicationsMining， Resources & EnergyReal Estate & PropertyRetail & Consumer ProductsSalesScience & TechnologySelf EmploymentSport & RecreationTrades & ServicesOther
Property
BuyRent
Cars
Used CarsNew CarsOthers
Services
BusinessCraftsDesign And WebEventsHome ImprovementLegalLessonsPersonalPetsPhotographyRepair And Technical SupportWellnessWriting， Translation， And TranscriptionOthers
Community
Activities & GroupsArtists & MusiciansClasses & LessonsEventsFriendship & NetworkingLost & FoundRideshareSports TeamsVolunteersTravel & Travel PartnersSkills & Language SwapOther

What is the problem when the EPC light comes on in a car?

1 Answers
Khloe
07/29/25 11:04pm
The EPC indicator light has two states of illumination: during power-on self-test and under other circumstances. The power-on self-test is an indication that the vehicle is monitoring the status of all sensors before driving. Generally, if the vehicle is not started after power-on, the light will turn off by itself after about 3 seconds. In other cases, if the EPC light comes on or remains lit for a long time after the vehicle is started, the main causes may include faults in the engine intake system, throttle valve, fuel system, engine, ECU control unit, or brake lights. Below is a detailed introduction to the reasons for the EPC light coming on under other circumstances: Engine intake system fault: The EPC light will alert when the engine intake is not smooth or insufficient. Throttle valve fault: Carbon buildup is a common issue with the throttle valve. Additionally, dirt on the main body can affect intake, causing the indicator light to come on. Fuel system fault: Examples include substandard fuel, deteriorated fuel, or poor fuel atomization. Engine fault: Insufficient engine pressure or issues with the intake valve and other power system components can also trigger the EPC light. ECU control unit fault: For instance, interference with the vehicle computer signals or false alarms from the vehicle computer. Brake light fault: Situations such as brake lights not working, brake switch failure, or brake circuit issues. Solutions for when the car's EPC light comes on: Troubleshoot the intake system, use fuel with the appropriate octane rating, clean the throttle valve, etc. Remove carbon deposits from relevant parts. Re-flash the ECU-related data. If the EPC light comes on, the owner can first try turning off the engine and restarting it to see if the EPC light remains on. If it does not, there may be no issue, and the EPC light might have been affected temporarily. If the EPC light stays on or frequently comes on, drive to the nearest vehicle repair point for professional assistance to diagnose and fix the issue, ensuring timely elimination of safety hazards. The full English name of EPC is Electronic-Power-Control, which translates to electronic power control. Most people refer to it as the engine electronic stability system. The EPC system mainly includes controllers and sensors related to the power system. When the sensor data in the system is abnormal, the EPC system will take predefined measures for the power system. Common EPC indicator lights generally display two colors: yellow and red. If the EPC fault light is yellow and the car can still drive normally, proceed slowly to a repair point for inspection. If the EPC fault light is red, the situation is more severe. Pull over immediately and contact relevant repair personnel for assistance. Forcing the car to drive under these conditions can directly affect the vehicle's core components or driving safety.
Was this review help?
11
5
Share
More Forum Discussions

What Causes the Thumping Sound When Driving Over Speed Bumps?

When a car makes abnormal noises while driving over speed bumps, it is not the sound of the chassis hitting the ground. Instead, it indicates some mechanical issues with the vehicle. This could be due to excessive clearance at the front fixing point of the steering knuckle or problems with the car's shock absorbers. Below is additional information about speed bumps: 1. Road Speed Bumps: Also known as speed humps, these are transportation facilities installed on roads to slow down passing vehicles. They typically have a striped shape, with slight variations, and are made primarily of rubber and metal. 2. Purpose: Speed bumps are usually painted yellow and black to attract visual attention and are slightly arched to achieve the goal of vehicle deceleration. They significantly reduce the occurrence of various traffic incidents and serve as a new type of specialized safety facility. They not only ensure safe deceleration but also provide a buffering effect, enhancing safety at intersections.
5
1
Share

What does vehicle sheet metal repair mean?

Vehicle sheet metal repair refers to the process of repairing damaged parts of a vehicle using specialized tools through hammering or jacking methods, known as vehicle sheet metal jacking repair. All parts of the vehicle body, except for the front and rear bumpers, can undergo sheet metal repair. After the sheet metal repair is completed, the repaired area needs to be sanded, filled with putty to level it, and then painted. Sheet metal repair for motor vehicles is a method of automotive maintenance used when the vehicle's exterior is damaged or deformed. It involves repairing the damaged parts of the vehicle using sheet metal repair techniques. Sheet metal repair requires high skills from the repair personnel, who must understand the characteristics of the vehicle body materials, the stress characteristics of the body, and the welding techniques of the body. Only with this fundamental knowledge can they perform sheet metal repair operations on the vehicle.
8
4
Share

Why does a car get moldy inside after being parked for a long time?

Long-term parking leading to mold growth inside the car is primarily due to prolonged lack of ventilation or excessively humid environments, which promote mold proliferation. Below are specific methods for dealing with moldy car interiors: 1. Knitted and fabric interiors: First, use a vacuum cleaner to remove dust and mold from the surface of the interior. Then, clean with a car interior-specific cleaner. After spraying, you can dry the interior with a blower or drive the car into the sun to dry. 2. Leather interiors: Wipe the interior with a cloth and cleaner, then let it air dry naturally. Alternatively, you can use the car's heating mode to dry it. 3. Genuine leather interiors: Regular maintenance is required for genuine leather interiors. Use neutral or alkaline cleaners for cleaning, and avoid harsh mold removers to prevent corrosion. After cleaning, let it air dry naturally (avoid exposing the car to direct sunlight).
3
1
Share

Where is the vehicle inspection certificate sticker placed?

The inspection certificate sticker is placed on the upper right corner of the front windshield. According to Article 13 of the "Regulations for the Implementation of the Road Traffic Safety Law": The motor vehicle inspection certificate and insurance certificate should be affixed to the upper right corner of the front windshield of the motor vehicle. Failure to affix the relevant vehicle certificates as required is a violation of the law. Below is relevant information: 1. The motor vehicle inspection certificate is affixed to the upper right corner of the front windshield. Not only the motor vehicle inspection certificate but also the compulsory traffic insurance certificate must be affixed to the upper right corner of the front windshield. 2. In the past, three certificates needed to be displayed in the vehicle: the motor vehicle inspection certificate, the green environmental protection certificate, and the compulsory traffic insurance certificate. Now, only two certificates need to be affixed: the motor vehicle inspection certificate and the compulsory traffic insurance certificate.
12
2
Share

What to Do When Mercedes Remote Key Fails?

Solutions for Mercedes key failure: Disassemble the key to check if the battery is dead or if there is any corrosion. Inspect the unlock button for any malfunctions. If the battery is dead, replace it immediately. In case of corrosion or malfunction, replacement is the only option. Here are the steps to replace the car key battery: 1. Press the button on the car remote key to pop out the mechanical key. 2. Hold the car key with the icon facing up. Grip both sides of the key with your left hand while pressing down with your right thumb. Pull outward with both hands, then push the right half of the key downward. Use a small knife to pry open the gap until the key splits into two parts. 3. Separate the part without the pattern by prying open the middle gap. Between the two parts is a rubber strip. Use a small knife to remove the round lithium battery.
9
3
Share

Does the driver's license replacement require the person to go in person?

The driver's license replacement does not require the person to go in person. You can entrust family members or friends to handle it by providing the ID card, driver's license, physical condition (medical examination) certificate issued by medical institutions at or above the county level, and three personal ID photos. The following materials are required for replacing the driving license: 1. The identity proof of the vehicle driver; 2. The driving license; 3. A physical condition certificate issued by a medical institution at or above the county level or a military regiment level; 4. For applying for a special small automatic passenger car for the disabled, a physical condition certificate issued by a specialized medical institution designated by the provincial health authority should be submitted; 5. When an agent applies for driving license business, the agent's identity proof and the application form or physical condition certificate signed jointly by the vehicle driver and the agent should be submitted.
18
0
Share
Trending Ranking
What type of fuel should be used for the Mercedes-Benz C260?
Where is the rear wiper washer nozzle located on the Dongfeng Fengguang 580?
What is compressor oil?
4
Where is the car tracker installed in the car?
5
What to Replace During the Second Car Maintenance?
6
What is the Principle of Air Suspension?
7
What Causes the Belt Noise When the Car Air Conditioner is On?
8
Will Car Rust Remover Damage the Paint?
9
What is the Proper Tire Pressure for Cars?
10
Can a car cool without turning on the AC?
More Forum Discussions

What to Do When the Rearview Mirror is Unclear on Rainy Days?

9
2
0

Can People with Monocular Vision Impairment Obtain a Driver's License?

19
3
0

What oil is used for a four-wheel drive transfer case?

15
4
0

What does it mean when the engine oil light comes on?

16
5
0
About Us
Terms of Use
Privacy Policy
Help
Contact Us
FAQ
Cookie
Cookie Policy
Cookie Settings
© 2025 Servanan International Pte. Ltd.