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 Does It Mean When the EPC Light Comes On?

1 Answers
AveryMarie
07/24/25 4:59pm
The EPC indicator light can illuminate in two scenarios: during the power-on self-test and under other conditions. The power-on self-test is an indication that the vehicle is checking 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. If the EPC indicator light comes on under other circumstances or remains illuminated for an extended period after the vehicle is started, the possible causes include faults in the engine intake system, throttle body, fuel system, engine, ECU control unit, or brake lights. Below is a detailed explanation of the reasons for the EPC light coming on under other conditions: Engine intake system fault: The EPC light will alert you if the engine intake is obstructed or insufficient. Throttle body fault: Carbon buildup is a common issue with the throttle body. Additionally, dirt accumulation can affect intake, triggering the indicator light. Fuel system fault: This includes issues such as substandard fuel, degraded fuel, or poor fuel atomization. Engine fault: Insufficient engine pressure or problems with components like the intake valve in the powertrain can also cause the EPC light to come on. ECU control unit fault: This may involve interference with the vehicle's computer signals or false alarms from the computer. Brake light fault: Situations such as brake lights not working, faulty brake switches, or brake circuit issues can trigger the EPC light. Solutions for when the EPC indicator light comes on: Troubleshoot the intake system, use fuel with the appropriate octane rating, clean the throttle body, etc.
Was this review help?
1
0
Share
More Forum Discussions

What brand of car is KIA?

The car with the KIA logo is Kia Motors. Kia is a South Korean automobile brand, and the Hyundai Kia Automotive Group is the fifth-largest automobile manufacturer in the world by production volume. The models produced by Kia are generally positioned in the lower-end segment, with a focus on family-oriented vehicles. Relevant information about car logos is as follows: 1. Introduction: "Car logo" is the abbreviated term for automobile emblems, referring to the logos of various car brands, which often serve as representatives of automobile companies. Automobile logos include: the trademark or factory emblem of the car, product labels, engine model and serial number, vehicle model and serial number, as well as the vehicle identification number (VIN), etc. 2. Unauthorized modification of car logos is prohibited: Arbitrarily changing the car logo violates the "Motor Vehicle Management Regulations": The car logo must correspond to the model of the vehicle, and unauthorized use is not permitted. If discovered, it will be dealt with according to the national regulations concerning the technical conditions for the safe operation of motor vehicles.
18
0
Share

Does the Audi Q2L automatically lock when the person walks away?

The Audi Q2L does not automatically lock when the person walks away, but it can be modified to do so. Below is a brief introduction about Audi: 1. Basic Information: Audi is a renowned automobile developer and manufacturer, with its logo featuring four interlocking rings. Currently a subsidiary of Volkswagen Group, its headquarters are located in Ingolstadt, Germany. Main models include Audi A1, Audi A3, Audi A4, Audi A5, Audi A6, Audi A7, Audi A8, Audi Q1, Audi Q2, Audi Q3, Audi Q5, Audi Q7, Audi Q8, Audi TT, Audi R8, as well as the S and RS performance series. 2. Company Background: The Audi logo with four rings originates from the 1932 merger of Audi with Horch, Wanderer, and DKW, forming the 'Auto Union'. Each ring represents one of the companies. The four rings of equal size, interlocked side by side, symbolize the equal status and unbreakable unity of the four companies.
2
1
Share

Why can't the car window go up and down?

The reasons why the car window glass cannot go up and down: deformation or damage of the glass mud slot; loose screws fixing the lifter; damage to the window regulator; deviation in the installation position of the guide rail. For electric windows that cannot go up and down, first check whether it is a problem with some windows or all windows cannot go up and down. The following is an introduction to the car one-touch window function: 1. Function introduction: The one-touch window has two gears. When you want to open part of the window, you can use the first gear. To fully open the window, you can press it all the way down, and there will be a very small sound and feedback force. At this time, you can let it automatically lower the window. Generally, buttons with one-touch window function have anti-pinch function. For cars that often carry children, it is best to have this function, and the driver must lock all four windows on the control side while driving. 2. Definition: One-touch window refers to a system where the car window glass can be controlled to go up and down with one button. Ordinary electric windows require holding down the switch, and the window stops moving when the button is released at the desired position.
12
0
Share

Which direction do the wheels turn when the steering wheel is turned left?

How the wheels turn when the car steering wheel is turned "left" or "right": When moving forward, turning left makes the car turn left, and turning right makes it turn right. Below is an introduction to the car steering wheel: 1. Steering wheel: A wheel-shaped device used to control the direction of movement in cars, ships, airplanes, etc. Its function is to convert the force applied by the driver to the edge of the steering wheel into torque and transmit it to the steering shaft. 2. Function: The steering wheel is generally connected to the steering shaft via splines. Its purpose is to transform the force applied by the driver to the edge of the steering wheel into torque and transmit it to the steering shaft. Using a larger-diameter steering wheel reduces the hand force required from the driver when turning. The steering intermediate shaft, as a connecting component between the steering gear and the steering shaft, facilitates the standardization of the steering gear, compensates for errors during manufacturing and installation, and optimizes the installation of the steering gear and steering wheel in the vehicle.
8
5
Share

What causes the dashboard lights to go out and the car to fail to start when ignition is attempted?

When the dashboard lights go out and the car fails to start upon ignition, it may indicate a malfunction in the ignition system. Ignition system faults can be categorized into two types based on their location: low-voltage circuit faults and high-voltage circuit faults. 1. Common low-voltage circuit faults include: insufficient battery charge; poor or incorrect wiring connections; poor battery grounding; damaged distributor or Hall sensor; faulty ignition switch or poor wiring; damaged transistor ignition control unit or poor wiring. Diagnostic methods for low-voltage circuit faults mostly involve using an ammeter or voltmeter to check each wire sequentially to identify and eliminate the fault point. 2. Common high-voltage circuit faults include: detached or leaking high-voltage wires; cracked or punctured distributor cap; eroded or punctured distributor rotor; excessive or insufficient spark plug electrode gap; excessive carbon buildup on spark plugs; damaged spark plug insulator; damaged ignition coil or detached wiring. High-voltage circuit faults are often diagnosed using the high-voltage spark test method, which involves removing the central high-voltage wire from the distributor or a cylinder's high-voltage wire, placing the wire end 3-6mm away from the engine block, and starting the engine to test for spark.
20
1
Share

Is neutral gear N or P?

Neutral gear is N, used for temporary stops; P is the parking gear, used for long-term parking. Neutral gear generally refers to the state where the gear lever of a motor vehicle is not placed in any forward or reverse gear, and the transmission is completely disengaged from the drive wheels. For manual transmissions, the neutral position is in the middle, while for automatic transmissions, it is marked as "N". Coasting in neutral has long been considered a fuel-saving practice, especially among most truck drivers who often turn off the engine and coast in neutral to save fuel. However, for fuel-injected engine cars, coasting in neutral should be used with caution, and turning off the engine while coasting in neutral is even more inadvisable. Once the gear lever is placed in neutral for coasting, the drive wheels lose their driving force, and the connection between the engine and the drive wheels is severed. The car then moves forward by its own inertia. If an emergency arises requiring braking during this time, all braking force must be provided by the brakes alone. This demands that the braking system supply a large amount of braking force in a very short time, but the braking system's capacity is limited. Therefore, this will inevitably affect braking performance, at least lengthening the braking distance.
4
2
Share
Trending Ranking
What Happens When a Car's Air Conditioning Compressor Burns Out?
How to distinguish between the 2019 and 2020 Land Cruiser models?
How to Open the Trunk of Honda Elysion?
4
Why was the GTR discontinued in China?
5
How many years can a small truck be driven before it is scrapped?
6
How to Restore Power After a Complete Power Failure in a BMW?
7
How Often Should the Fuel System Be Cleaned?
8
What are the four subjects of the driving test?
9
Can You Buy Display Cars from 4S Stores?
10
How many factories does BYD have in China?
More Forum Discussions

Is it a problem if the Magotan hasn't had its transmission fluid changed for 120,000 kilometers?

6
4
0

Is It Necessary to Apply Engine Oil on a Sponge Filter?

1
4
0

Will the 4S shop rework and compensate for paint color differences?

9
0
0

How to Determine the Size of a Wheel Hub Center Cap?

12
2
0
About Us
Terms of Use
Privacy Policy
Help
Contact Us
FAQ
Cookie
Cookie Policy
Cookie Settings
© 2025 Servanan International Pte. Ltd.