Audi EPC Light [What Causes It and How to Fix?]

You are most likely familiar with EPC if you have an Audi vehicle. If the EPC warning light comes on, it will surely worry you. But what exactly is the Audi EPC light? What causes it to come on?

Audi’s EPC, or the Electronic Power Control, refers to Audi vehicles’ computerized ignition and management system. There are several reasons why the EPC warning light on an Audi vehicle comes on. Some of these are the following:

  1. Electronic Throttle Body Failure
  2. Fuel Injector Failure
  3. Brake Pedal Switch Failure
  4. Brake Pressure Sensor Failure
  5. Anti-lock Brake System (ABS) Sensor Failure
  6. Power Steering Failure
  7. Engine Speed Sensor Failure
  8. Crankshaft Position Sensor Failure
  9. Camshaft Position Sensor Failure
  10. Mass Air Flow (MAF) Sensor Failure
  11. Cruise Control Issues
  12. Accelerator Pedal Failure

Read on to learn more about the Audi EPC light, what causes it to light up, and how it can be fixed.

Audi EPC Light [What Causes It and How to Fix?]

Audi epc light

EPC is short for Electronic Power Control. It refers to the computerized ignition and management system installed in Audi vehicles. It controls other systems that control the engine.

If the EPC light comes on, it’s quite hard to tell what the problem is. There are different reasons why the EPC light on an Audi vehicle comes on. But one thing you can be sure of is that there is indeed a car issue or two that you need to address immediately.

Some of the causes are the following:

  1. Electronic Throttle Body Failure
  2. Fuel Injector Failure
  3. Brake Pedal Switch Failure
  4. Brake Pressure Sensor Failure
  5. Anti-lock Brake System (ABS) Sensor Failure
  6. Power Steering Failure
  7. Engine Speed Sensor Failure
  8. Crankshaft Position Sensor Failure
  9. Camshaft Position Sensor Failure
  10. Mass Air Flow (MAF) Sensor Failure
  11. Cruise Control Issues
  12. Accelerator Pedal Failure

Let’s briefly talk about these causes:

1. Electronic Throttle Body Failure

When there is a faulty electronic throttle body, you will most likely notice a very low idle. If this issue is severe, your car might even stall when the throttle is pressed quickly or when you come to a stop.

Electrical connection issues can result in intermittent or inaccurate information to your Audi’s computer. Delayed or false information will enable the computer to make erroneous corrections to the air-fuel mixture.

2. Fuel Injector Failure

If there is an abrupt loss of engine power, it is a clear sign of fuel injector failure. A clogged fuel injector means that there is also an irregular supply of fuel.

This can result in fuel level fluctuations that cause the engine to run in surges. The EPC light will likely come on if this happens to your Audi.

3. Brake Pedal Switch Failure

A faulty brake pedal switch can mean that your Audi’s rear brake lights are not illuminating. This is very risky since the driver behind you won’t know whether you are slowing down or not.

While this can mean that a brake light bulb is broken, it can also mean that the brake pedal switch is faulty. In which case, the EPC light will come on to alert you.

4. Brake Pressure Sensor Failure

The pressure reading should be zero if you are not stepping on the brake pedal. It will only increase in value as you step on and apply pressure to the brake pedal.

So, what if the pressure reading constantly shows the maximum value even if you are not stepping on the brake pedal? This means that the brake pressure sensor is faulty. This is one of the causes why the EPC warning light on your Audi comes on.

5. Anti-lock Brake System (ABS) Sensor Failure

The anti-lock brakes become inoperable when there’s a faulty ABS wheel sensor. If this happens, the system triggers an alert and causes the ABS light to come on. The EPC light will come on, too, since the electronic control module of your Audi will fail to receive essential data from the sensor.

6. Power Steering Failure

Power steering failure may happen if a hydraulic pipe gets damaged, such as being cut by road debris. If this happens, the loss of power steering will not be sudden. Instead, it will be gradual until you notice it getting heavier. If this happens, the EPC light will most likely come on.

7. Engine Speed Sensor Failure

In case of a faulty engine speed sensor, your Audi’s electronic control unit might not detect a transmission speed sensor signal. In which case, the EPC light will come on.

8. Crankshaft Position Sensor Failure

If there is a faulty crankshaft position sensor, it won’t be able to provide accurate information about the engine’s piston positioning. This will result in a cylinder misfire.

Also, it can result from spark plug timing failure. But if the spark plug checks out, the crankshaft sensor is most likely the source.

9. Camshaft Position Sensor Failure

A faulty camshaft position sensor means that it cannot accurately transfer data. If this happens, there will be mismatched fuel delivery and ignition timing. Your Audi vehicle will have poor acceleration, stall, lack power, or even shut off.

10. Mass Air Flow (MAF) Sensor Failure

If the EPC light on your Audi vehicle comes on, it may be because of a faulty mass airflow sensor. It will then be not easy to start the engine. If it starts, the engine will most likely stall. You will notice the engine hesitating or dragging when idle or jerking during acceleration.

11. Cruise Control Issues

Your Audi’s EPC light will come on if there are cruise control issues. When we say cruise control issues, it can mean a blown fuse or a faulty brake pedal switch. Also, it can result from problems with the ABS or the throttle control system.

12. Accelerator Pedal Failure

The EPC light will also come on if a faulty accelerator pedal is faulty. In which case, the engine idling speed increases, there is poor acceleration, and the vehicle will switch to “limp home mode.”

Again, what does it mean when the EPC light comes on in an Audi? When your Audi’s Electronic Power Control (EPC) warning light is on, this might signify an issue with the throttle system, including the accelerator pedal, traction control, fuel injection, and throttle body.

What Is EPC

audi epc light causes

Computerized Ignition and Management System

EPC, or Electronic Power Control, is your Audi vehicle’s computerized ignition and management system. It controls other systems that control the engine. The EPC light serves as a warning that there is an issue with your vehicle’s throttle system.

When we say throttle system, it consists of several parts, including:

  • Traction control,
  • The cruise control unit,
  • Throttle body, and
  • Accelerator pedal.

Can You Drive with an EPC Light On

Do Not Ignore the EPC Light

You can still drive your Audi even with an EPC light on. However, it is not recommended to ignore the EPC light. Besides, your car will most likely shift to limp mode too. In which case, you have to bring your car to a repair shop immediately.

Can You Continue to Drive While Car Is In Limp Mode?

But what if your vehicle doesn’t shift to limp mode even with the EPC light on? Can you continue to drive your car? Again, the answer is yes, but it is not recommended.

Bring Your Car to a Repair Shop Immediately

You are still advised to bring your car to a repair shop immediately. Also, it is possible that even if you continue to ignore the EPC light, your car will most likely shift to limp mode sooner or later.

If the EPC light comes on, it doesn’t necessarily mean that your car has serious or irreparable issues. It can also be a minor issue only. But then again, you wouldn’t know this unless you bring it to a repair shop or you decipher the fault codes on your own.

Whichever it may be, make sure you figure out the issue immediately. You would not want to turn this minor issue into a major one because you choose to ignore the EPC light.

How to Fix the EPC Light on an Audi

There is no standard solution when the EPC light comes on. This is because there are many reasons behind it. It merely serves as a warning that there is indeed something wrong with your car and that it needs to be addressed immediately.

Use an OBD-II Scanner

If your Audi’s EPC light comes on and you have an OBD-II scanner, it will be convenient to figure out what’s wrong with your Audi.

Plug the OBD scanner in and check the fault codes that will appear. Each fault code has a corresponding car issue; you need to decipher those codes.

Take Your Audi to a Professional Technician

Of course, it’ll be more convenient if you take your Audi vehicle to a professional technician and mechanic. They can decipher the fault codes for you and tell you how they will address the issue.

How to Fix the EPC Light on a Volkswagen

How Much Does It Cost to Repair a Vehicle with an EPC Light?

Repairing an Audi vehicle with an EPC light has no fixed price. There are different reasons why the EPC light comes on.

Therefore, the price is based on which part of the throttle system has a problem and the severity. It also includes the cost of the part to be replaced and the labor cost.

Suffice to say that the repair cost may be as low as $100. But it can also be about $3,000 or more.

Frequently Asked Questions – What Does the EPC Light on an Audi Mean

audi epc light repair cost

Several frequently asked questions can guide you about your Audi vehicle’s EPC light:

What Does It Mean When the EPC Light Comes on in an Audi?

The Electronic Power Control, or EPC, is light on your Audi vehicle, warning you that there is an issue in the throttle system of your car. The problem can be related to the cruise control, the traction control, the throttle body, the fuel injection, or the acceleration pedal.

Can I Drive with EPC Light on Audi?

Your Audi car may still be capable of running even with the EPC light on. However, you will most likely do more harm to your car if you continue to drive it. Aside from that, you are risking your life too, and the life of others on the road.

What Causes the EPC Light to Come On?

If the EPC warning light on an Audi comes on, the car’s system detects a power issue. The EPC light does not explicitly identify the problem. Instead, it only warns the driver that there is an issue that needs to be addressed immediately.

Is EPC Light Expensive to Fix?

There is no fixed price to address car problems alerted by the EPC light. This is because there are different reasons why it lights up. So, the price varies depending on the type of issue your car encounters. A minor issue can cost about $100, but a major one can cost roughly $3,000 or above.

Can Low Oil Cause EPC?

A shallow oil level will likely cause the EPC warning light to come on.

Can Low Battery Cause EPC Light?

If your Audi vehicle has a dead or low battery, it will likely cause the EPC warning light to come on.

What Does EPC and Check Engine Light Mean?

EPC means Electronic Power Control. It lights up on the dashboard if there is a problem with the throttle system. This includes problems with the cruise control system, the throttle pedal, the traction control, or the throttle body.

The Check Engine Light signals a problem with the exhaust system, the fuel system, the ignition, or the emissions.

Is EPC Light Covered Under Warranty?

Your whole car is supposed to be covered by a warranty. There are different reasons why the EPC light comes on. Whichever it is, it is supposed to be covered by a warranty. So, bring your car to the dealer and fix it under warranty.

What Does EPC on a Car Mean?

EPC is short for Electric Power Control. It is one of those warning lights on the dashboard of your Audi vehicle. Once its light comes on, there is some issue with your car’s throttle system.

What Is the Throttle Body?

The throttle body is a vital part of the car’s air intake system, which controls the air flowing into the car’s engine. It can be found between the car’s air intake and engine manifold. This is where fresh air is pulled into the engine, needed for combustion.

Can I Drive My Car with EPC Light On?

If the EPC light on your car’s dashboard comes on, you can still drive your car for a short amount of time. Immediately bring it to your dealer or a car care shop. The car issue can be directly addressed before turning into a major problem.

What Does EPC Light Mean on Audi Q5?

Once you notice the EPC warning light on your Audi Q5 come on, there is a detected problem with your car’s engine electronics. Most of the time, the issues detected by the EPC are malfunctioning sensors. These sensors can easily be replaced.

What Are the Signs of a Dirty Throttle Body?

When there’s a dirty throttle body, it will negatively affect the engine performance. Its symptoms include the following:

  • Stalling,
  • Poor fuel economy,
  • Poor acceleration, and
  • Rough idling.

Using a throttle body cleaning product, you can remove the dirt and debris buildup.

How Much Does It Cost to Replace Throttle Body?

The cost of the throttle body part typically ranges between $200 and $500. It all depends on the type of vehicle you drive. You also have to pay the labor cost, which typically ranges between $50 and $150.

What Causes a Throttle Body to Get Dirty?

The throttle body gets dirty when the engine shuts down. This is because hot exhaust gas and unburnt fuel stay on top of the engine. The vapors then bake from the engine heat. This then forms carbon deposits that get stuck inside the throttle body.

In Closing: Audi EPC Light

To reiterate, EPC is short for Electronic Power Control. It refers to the computerized ignition and management system installed in Audi vehicles. It controls other systems that control the engine.

It’s quite hard to tell the problem once the EPC light comes on. There are different reasons why the EPC light on an Audi vehicle comes on. But one thing you can be sure of is that there is indeed a car issue or two that you need to address immediately.

Some of the causes are the following:

  1. Electronic Throttle Body Failure
  2. Fuel Injector Failure
  3. Brake Pedal Switch Failure
  4. Brake Pressure Sensor Failure
  5. Anti-lock Brake System (ABS) Sensor Failure
  6. Power Steering Failure
  7. Engine Speed Sensor Failure
  8. Crankshaft Position Sensor Failure
  9. Camshaft Position Sensor Failure
  10. Mass Air Flow (MAF) Sensor Failure
  11. Cruise Control Issues
  12. Accelerator Pedal Failure

Since there are different reasons why the EPC light comes on, there is also no standard process to fix the problem. Therefore, there is no fixed price too as to how much you will spend on repairs.

But one thing you must never forget is not to ignore the EPC light. Once it lights up, bring it to your dealer or a car care shop. Make sure you address the issue before it’s too late.

Read next:

Is Audi Expensive to Maintain?

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What Is the Most Common Reason for the Check Engine Light?

Should You Buy an Audi, a BMW, or a Mercedes?

My Car Is Okay, But Why Is Its Check Engine Light Turning on?

Are Audis Good Cars? Why or Why Not?