2014 Mercedes-Benz CLA45 AMG Tire Pressure Warning Light Stays On

Tire Pressure Warning Light Causes for 2014 Mercedes-Benz CLA45 AMG

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Reviewed by
Aisha
Written by RepairPal Car Genius
Updated January 14, 2025
0%
40% chance it's the
Tire Leaking Air
0%
30% chance it's the
Wheel Leaking Air
0%
15% chance it's the
Tire Pressure Monitoring System
0%
15% chance it's
Something else
The most common reasons a 2014 Mercedes-Benz CLA45 AMG tire pressure warning light stays on are a leaking tire, a wheel that no longer holds air, or a faulty tire pressure monitoring system.
  • Tire Leaking Air: A puncture, valve stem issue, or rim damage can cause a tire to leak air, leading to loss of pressure.
  • Wheel Leaking Air: A puncture or damage to the tire or rim can cause air to leak, resulting in a loss of tire pressure.
  • Tire Pressure Monitoring System: A malfunctioning tire pressure monitoring system can be caused by faulty sensors or a dead battery in the sensor units.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

How much does it cost to fix a 2014 Mercedes-Benz CLA45 AMG tire pressure warning light stays on?

Common Repairs

The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.

When a tire pressure monitoring sensor fails, the tire pressure monitoring system control module will recognize a loss in communication and turn on the warning lamp which indicates the failure. This is most often the case. However, the tire pressure monitoring sensor may also fail by reporting incorrect tire pressures. This could cause a flat tire to go unrecognized, or a properly inflated tire to signal a low or high tire pressure warning.

When a relearn is needed, for any reason, the TPMS warning light will illuminate, and many vehicles will display a message relating to the TPMS system being inoperative or loosing communication. It is important to keep a watchful eye on tire pressures when this system is having issues because there is no warning available for underinflation or overinflation of the tires.

Wheels offer very few symptoms, but these symptoms should never be ignored. Visible cracks on the wheels may appear, especially after hitting a large bump, Most often, this will also be accompanied by loss of air from the tire on that wheel. Also, vibration in the steering wheel is very common when the tire is out of balance, and improper wheel nuts or bolts can cause creaking and popping noises to develop. Again, there are very few symptoms, but they should not be ignored.

The only symptoms of a TPMS control module failure are failing to alert the driver of underinflation or overinflation of one or more tires, failure to communicate with the body control module or TPMS sensors, or erroneously reporting incorrect tire pressure.

The only symptoms requiring diagnosis for the tire pressure monitoring system warning lamp is if the warning lamp has illuminated while the tires have correct air pressure, or if the air pressure for the tires is out of specification and the warning lamp is off. This is because the overwhelming majority of cases where the TPMS lamp illuminates is due to the change in ambient temperature.

What steps should I take to diagnose the tire pressure warning light issue in my 2014 Mercedes-Benz CLA45 AMG?

To effectively diagnose the tire pressure warning light issue in your 2014 Mercedes-Benz CLA45 AMG, begin with a thorough check of the tire pressure in all four tires using a reliable tire pressure gauge. It's crucial to ensure that the pressure aligns with the manufacturer's specifications, which can typically be found in your owner's manual or on a sticker located inside the driver's door jamb. Next, inspect each tire for any visible signs of damage, such as punctures, cuts, or bulges, as these could be contributing to pressure loss and triggering the warning light. Additionally, look for potential leaks by examining the tires and valve stems closely; a simple mixture of soap and water can help reveal leaks, as bubbles will form at the site of any air escape. If you've adjusted the tire pressure and checked for damage but the warning light remains illuminated, consult your owner's manual for instructions on resetting the tire pressure monitoring system (TPMS), as it may require a reset after pressure adjustments. However, if the issue persists despite these efforts, it is advisable to seek assistance from a qualified mechanic or an authorized Mercedes-Benz service center for a comprehensive diagnosis and repair. By following this systematic approach, you can efficiently address the tire pressure warning light issue and ensure your vehicle's safety and performance.

What could be causing the tire pressure warning light to stay on in a 2014 Mercedes-Benz CLA45 AMG?

When the tire pressure warning light stays on in a 2014 Mercedes-Benz CLA45 AMG, it is essential to identify the underlying issues to ensure your vehicle's safety and performance. The most common reason for this warning light is low tire pressure, which can result from natural air loss or punctures. Regularly checking and maintaining your tire pressure at the manufacturer's recommended levels is crucial. Another possibility is a faulty tire pressure sensor; if the sensor is defective, it may need to be replaced to restore accurate readings. Additionally, the sensors may require recalibration, which can be performed by a professional to ensure they are functioning correctly. Electrical faults within the tire pressure monitoring system can also cause the warning light to illuminate, often necessitating a diagnostic scan to identify the specific issue. Lastly, environmental factors, such as drastic temperature changes, can affect tire pressure and lead to false alerts. By understanding these common problems and addressing them promptly, you can maintain optimal vehicle performance and safety.

What immediate steps should be taken to address the tire pressure warning light on a 2014 Mercedes-Benz CLA45 AMG?

When the tire pressure warning light illuminates on your 2014 Mercedes-Benz CLA45 AMG, it is crucial to act promptly to avoid serious safety risks and potential damage to your vehicle. Neglecting this warning can lead to reduced traction, increased tire wear, and even tire blowouts, which can compromise your safety on the road. Start by checking the tire pressure with a reliable gauge, ensuring each tire is inflated to the manufacturer's specifications. If you find any tires underinflated, use an air compressor to bring them up to the correct pressure. Additionally, inspect your tires for any signs of damage, such as punctures or bulges, as these can exacerbate the problem and require immediate attention. Once you have adjusted the tire pressure, consult your vehicle's manual to reset the tire pressure monitoring system, ensuring it accurately reflects the new tire conditions. Regular monitoring of your tire pressure is essential to maintain optimal performance and prevent the warning light from reappearing, ultimately safeguarding your vehicle and enhancing your driving experience.

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