If you own a 2015 Audi A4, then you may have heard about the indirect tire pressure monitoring system (TPMS). This system is designed to alert drivers when there is a significant loss of pressure in their tires. In this article, we will discuss how the 2015 Audi A4 indirect TPMS works, how to reset it, and why it is an essential safety feature for your car.
What is an Indirect Tire Pressure Monitoring System?
Before we delve into how the 2015 Audi A4 indirect TPMS works, let’s first understand what an indirect TPMS is. An indirect TPMS system does not rely on sensors installed in each tire to measure tire pressure. Instead, it uses the vehicle’s anti-lock brake system (ABS) to monitor the speed of each wheel. The indirect TPMS calculates the tire pressure based on the assumption that all four tires have the same diameter and rotate at the same speed.
How Does the 2015 Audi A4 Indirect TPMS Work?
The 2015 Audi A4 indirect TPMS system utilizes the ABS system to monitor the rotational speed of each tire. The system uses a computer algorithm to detect changes in tire pressure by comparing the relative speed of each tire. If one tire is underinflated, it will rotate at a slightly different speed than the other three tires. The computer will then detect this change and alert the driver via a warning light on the dashboard.
Tire Warning Light Indicators
If the 2015 Audi A4 indirect TPMS system detects a significant loss of tire pressure, it will trigger a warning light on the dashboard. The warning light will typically display a picture of an orange/yellow exclamation point with horseshoes around it. The warning light will continue to illuminate until the tire pressure is restored to the recommended level or reset.
How to Reset Audi A4 TPMS:
To reset the system, follow these steps:
Be sure to fill your tires to the correct PSI prior to following this procedure.
Turn the ignition key to the “On” position or have the vehicle running.
Select Menu on the MMI control panel behind the shifter.
Select “Servicing” and then “Tire pressure monitoring.”
Select “Store tire pressures” and then “Confirm.”
Audi says to drive the vehicle for at least 20 minutes at speeds above 12 mph to allow the system to recalibrate.
Common Causes for Tire Light to Turn ON:
Low tire pressure in one or more tires
High tire pressure in one or more tires
A punctured or damaged tire resulting in a leak
A malfunctioning TPMS module or wiring
Incorrect tire size or type
A tire that has been repaired improperly
A faulty / leaking tire valve stem
A problem with the car’s ECU
A problem with the TPMS programming or calibration
If the TPMS light comes on, it’s important to check your tire pressure as soon as possible and address any issues before they cause more serious problems or damage to your vehicle.
Benefits of the Indirect TPMS System
The 2015 Audi A4 indirect TPMS system provides several benefits to drivers. One of the most significant advantages of an indirect TPMS system is that it is more cost-effective than a direct TPMS system. Direct TPMS systems require sensors in each tire, which can be expensive to replace if they become damaged or faulty. Indirect TPMS systems, on the other hand, do not require additional sensors, which means lower maintenance costs.
Another benefit of an indirect TPMS system is that it is less prone to false alarms. Direct TPMS systems can sometimes trigger false alarms due to temperature changes. Indirect TPMS systems, on the other hand, rely on the vehicle’s existing ABS system, which is a more reliable and accurate method of measuring tire pressure.
Conclusion
The 2015 Audi A4 indirect TPMS system is an essential safety feature that helps drivers monitor their tire pressure. By utilizing the vehicle’s ABS system, the indirect TPMS system can detect changes in tire pressure and alert drivers when there is a significant loss of pressure. If you own a 2015 Audi A4, it is essential to understand how the indirect TPMS system works and how to reset it if necessary.
FAQ
Is the 2015 Audi A4 indirect TPMS system reliable?
Yes, the indirect TPMS system is reliable and accurate. However, it is important to note that the system may not detect minor changes in tire pressure, and it is still important to check your tire pressure regularly.
Can the 2015 Audi A4 indirect TPMS system be disabled?
No, the indirect TPMS system cannot be disabled. It is a required safety feature on all vehicles manufactured after September 1, 2007.
How often should I check my tire pressure with the 2015 Audi A4 indirect TPMS system?
You should check your tire pressure at least once a month, or before any long trips. It is also important to check your tire pressure when the temperature changes significantly.
Can I replace a tire with a different size on the 2015 Audi A4 without affecting the TPMS system?
No, if you replace a tire with a different size, it may affect the accuracy of the indirect TPMS system. It is recommended to replace all four tires with the same size and brand the vehicle comes with to ensure the system’s accuracy. We always recommend using OEM tires.