The warning light will only turn on when your tires are deflated. However, that’s not always the case as sometimes the Audi tire pressure light keeps coming on even when your tire pressure levels are optimal.
Let’s explore this issue and find out the reasons why the warning light on your Audi stays illuminated or keeps flashing.
Why Does My Audi’s Tire Pressure Light Keep Coming On?
There are multiple reasons why the tire pressure warning light keeps coming on. On your Audi, the Tire Pressure Monitoring System (TPMS) system is responsible for turning on the warning light.
It consists of several components including the sensors, control module, wiring harness, instrument cluster, etc. If any of these components fail, the warning light will illuminate, giving wrong signals.
Below are the common reasons why your Audi’s tire pressure light keeps coming on:
Troubleshooting Audi Tire Pressure Warning Light Keeps Coming On
To help you understand why your tire pressure light keeps coming on, below we’ve explained the common reasons and some possible fixes. Without wasting any more time, let’s get into the details.
Cause 01 – Low Tire Pressure
When the air pressure in any of your Audi tires is critically low, the tire pressure light on your dash will illuminate. If the air is leaking slowly, your car’s computer might not be able to detect the pressure fall.
As a result, the tire pressure warning light will turn on or keep flashing even when the pressure readings might remain stable.
>>What’s the fix?
First, check the air pressure of each tire with a tire pressure gauge. If the pressure is low, inflate them to the recommended pressure listed in your owner’s manual. In case you don’t have the manual in hand, check out the sticker inside your driver’s side door jamb.
After that, inspect each tire for any visible damage or punctures. If you notice any, have them repaired or replaced as soon as possible
Cause 02 – Improper Relearning After Rotating Tires
For your tire pressure light to work properly, the tire sensors must work in sync with your Audi’s computer system. When you rotate your tires, the sensor that was previously monitoring the tire pressure on one wheel may now be monitoring a different wheel.
Too often, this causes inaccurate readings. As a result, the tire pressure light keeps coming on or blinking. So, you must relearn the system after rotating the tires or changing the sensors on your Audi. The problem will persist if the relearning process was improper or not done at all.
>> What’s the fix?
Whenever you rotate a tire or change a sensor, you must relearn the tire pressure monitoring system on your Audi. The specific process can vary depending on the model and year of your vehicle.
However, here’s a general step-by-step relearning process for you:
- Step One:
First, inflate all your Audi tires to the recommended air pressure. Now, locate the TPMS reset button in your glove box or under the steering wheel.
- Step Two:
Turn on the ignition, but don’t start your car engine. Press and hold the TPMS reset button until the warning light on your dash begins to blink. Start the engine and drive your vehicle at speeds above 15 mph for at least 10 minutes.
- Step Three:
After driving for 10 minutes, the TPMS light should turn off. It’s a sign that your TPMS has been reset and relearned.
If there’s no TPMS reset button on your Audi, use a diagnostic tool to reset the system. In case the process doesn’t work for your car, visit your local Audi dealership or an authorized service center to have the TPMS relearned.
Cause 03 – Cold Weather
When the temperature outside goes extremely low, it can cause the tire pressure light to turn on at regular intervals. As the temperature drops, the air inside the tire contracts. It causes the tire pressure to fall.
The tire pressure monitoring system (TPMS) in your Audi detects this pressure drop and alerts the driver with a warning light on the dashboard.
>> What’s the fix?
First, you need to check whether the tire pressure is lower than the recommended levels. Use a tire gauge to measure the air pressure of each tire.
If the tire pressure is low, inflate the tires with an air compressor until you reach the standard tire pressure. In case the tires are inflated and the warning light is still coming on, reset the TPMS of your Audi by following the instructions in your owner’s manual.
Cause 04- Bad TPMS Sensors
Just like any other vehicle, the tire pressure monitoring system of your Audi largely depends on the TPMS sensors integrated inside the tire rims. These sensors monitor the air pressure in each tire and transmit the collected information to your car’s computer.
If any of the sensors go bad, they may send incorrect information to the car’s computer. Hence, it can cause the tire pressure warning light to illuminate.
>> What’s the fix?
In most cases, the sensors go bad due to drained batteries or regular wear and tear. Unfortunately, you can’t repair or change the battery as it is integrated into the sensors. Sensors are also not fixable most of the time.
If you’re lucky, the TPMS sensor may simply need to be reprogrammed or reset. However, damaged or failed sensors must be replaced with new ones to fix the warning light issue.
Cause 05- Tire Pressure Monitoring System Failure
Although rare, sometimes multiple components of your Audi’s TPMS might fail. Typically, it happens due to severe damage from road hazards. Let’s say the TPMS control module or the wiring harness of your Audi has been damaged. Or, there might be some kind of EMI interference that’s messing up with the signals sent by the TPMS sensors.
In any case, the TPMS system will fail and send wrong readings to your car’s computer, causing the tire pressure light to keep coming on.
>> What’s the fix?
As the TPMS is a very complicated system, we recommend not fixing it at home if you have no previous experience. So, if you suspect that your Audi’s TPMS is malfunctioning, it’s best to have it inspected and repaired by a qualified mechanic. This way, the problem will be properly diagnosed and resolved.
Conclusion – tire pressure light keeps coming on
To recap, Below are the common reasons why your Audi’s tire pressure light keeps coming on:
- Low tire pressure
- Improper relearning after rotating tires
- Cold weather
- Bad TPMS sensor
- TPMS Failure
If it’s not the case and all your tires are perfectly fine, the bad sensors, cold weather, or improper relearning process is to blame. While some of these issues are fixable at home, some require expert supervision. To solve the warming light issue, try to reset or reprogram the tire pressure monitoring system of your Audi.
In case the problem persists, you must get the vehicle checked by an expert mechanic to detect and resolve it.
Certification: BSc in Mechanical Engineering
Education: Mechanical engineer
Lives In: 539 W Commerce St, Dallas, TX 75208, USA
Rasel is an auto mechanic student and writer with over half a decade of experience in the automotive field. He has worked with top automotive brands such as Lexus, Quantum, and also owns two automotive blogs autocarneed.com and taxiwiz.com.