Lexus: Why is My Tire Pressure Light On?

Tire pressure lights typically illuminate to alert the driver to low air pressure in at least one tire. This article covers what to do when your tire pressure light comes on in your Lexus.

By Kate Halse - November 11, 2014
Contributors: MachineMan

This article applies to the Lexus (2005-2013).

When your tire pressure light goes on, the problem could be low tire pressure in one or more tires. However, it could also mean that you have a flat tire. When this light comes on, pull over when possible in a safe setting, such as a parking lot. The following steps can help you figure out what to do next.

Tools Needed

  • Tire pressure gauge (manual or digital)

Step 1 - Pull over safely

The tire pressure light indicates a problem related to one or more tires on your car. According to Firestone Complete Auto Care, the tire pressure warning light often illuminates when a tire is under-inflated by 25 percent or more. Unless your tire blows out, wait until you can safely pull over away from traffic to check your tire pressure. If you are driving at higher speeds, such as on a highway, remain calm and firmly grip the steering wheel to stay in control of your vehicle. For blow outs, maintain control over your vehicle and move over to the side of the road or a safe location immediately.

Pro Tip

If you are on the highway or are around other vehicles, turn on your hazard lights when you are pulling over, especially if you have a blown out tire.

Step 2 - Check your tire pressure

Your tires may be low or even flat. Using a tire pressure gauge, either manual or digital, check your vehicle's tire pressure. You can find the recommended tire pressure level for your Lexus in the owner's manual or in a tire placard located in the vehicle's door edge, door post, or glove compartment. You can also check your PSI recommendation on the tire itself.

Figure 1. Locate PSI recommendation on the tire.

If the tire pressure is a bit low but there are no obvious signs of a blowout or an impending flat, you can continue on your way, staying alert for any signs of trouble with the affected tire. Many gas stations have free air stations where you can top off your tire.

(Related Article: How to Check Your Tire Pressure - Clublexus.com)

Step 3 - Head to a tire repair shop

Whether you are not comfortable checking your own tire pressure or you can see a problem with one of your tires, it may be time to visit a nearby repair shop. In this case, carefully drive the vehicle to a nearby tire repair shop when it is safe to do so. At the tire shop, they will inspect your tires for any holes or tears. If they find a hole or tear in your tire, they will patch or plug it for a decent price. In some cases, they may tell you that you need a new tire if yours isn't fixable.

(Related Article: High Performance Tire Reviews - Clublexus.com)

(Related Article: How to Fix a Tire Leak - Lexusclub.com)

Step 4 - Reset the tire pressure monitoring system (TPMS)

Some Lexus owners inflate their tires slightly under the manufacturer recommendation, which keeps the tire pressure light illuminated. In this case, resetting the TPMS should turn the light off.

  • Turn on the ignition.
  • Put your palm face up at the bottom of the dash precisely half way between the gas and brake pedals.
  • Slide your arm straight back underneath the dash approximately 10 inches.
  • Press and hold the button you feel for a few seconds.
  • When the warning light flashes, it means it has been reset.
Figure 2. Reset the TPMS.

(Related Article: How to Fool Your TPMS - ClubLexus.com)

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