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30% Off Orders Over $150, 20% Off Orders Over $100, 10% Off Orders Over $50

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Save 30% Off Orders Over $150 or 20% Off Orders Over $100 or 10% Off Orders Over $50
Use promotional code PROMO10 at checkout to receive 10% off orders over $50. Use promotional code PROMO20 at checkout to receive 20% off orders over $100. Use promotional code PROMO30 at checkout to receive 30% off orders over $150. Not valid in combination with any other discounts or promotions. Not valid on tires, special order, wheels, outside purchase or sale products, installed merchandise, commercial, or fleet. Excludes the following brands: Traxxas, Superchips, Hypertech, Edge, Bully Dog, Diablo, Edelbrock, Holley, Autometer, Accel, K&N, MSD and BBK Performance. Valid online until 2:59 am EST on 12/22/14. Online orders scheduled for in-store pick up must be completed in store by closing on 12/21/14 for discount to apply.

Free Shipping Over $50
Free Ground Shipping on Ship to Address orders over $50. Offer only valid on in-stock merchandise valued at a total of $50, after any discounts have been applied, and before any core charges, shipping charges, fees and taxes have been added. Certain items exceeding weight and size limitations are excluded from all shipping promotions and may require additional shipping fees. Please see item descriptions or visit our Shipping Policy page for details.

Tire Pressure Monitoring System Truths


Tire Pressure Monitoring
System Truths

It can be tough to tell if the air in a tire is too low or too high just by looking at it. Luckily for us, most newer cars have a Tire Pressure Monitoring System (TPMS) that continuously monitors the pressure in your tires through sensors located in the tires (direct system) or the use of wheel speed and other vehicle sensors (indirect system). The information collected by the sensors is transmitted to an on-board processor that interprets the sensor signals and warns the driver when tire pressure is below the minimum acceptable level by illuminating a warning lamp.

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Most vehicles use a direct system where a tire pressure sensor has been placed in each tire, which is linked to your vehicle’s onboard computer to directly measure air pressure.

A small number of vehicles use an indirect tire pressure monitoring system that monitors the relative speed and rotation of the vehicle’s wheels and alerts you if one wheel is significantly out of sync with the others.

Underinflated tires can take a toll on your wallet and your safety by affecting your gas mileage and shortening tire life due to uneven wear. Even more importantly, under-inflation can stress a tire to the point of failure, putting you in jeopardy of having a blowout on the road.

There are many things that can come into play and affect tire pressure, including temperature changes, tire punctures or other damage. Tire pressure can drop about 1 psi (pounds per square inch) for every 10 degrees and tires lose about 1.5 psi per month as air escapes from the tire naturally.

On cold mornings, the TPMS light lamp may light up for a short period of time and then turn off. This usually is caused by slightly low tire pressure that falls below the warning threshold overnight, but returns to an acceptable level as the tires heat up. In the summer, tires can overinflate, also triggering your TPMS light. If you notice this happening, bring your car into Pep Boys for a free tire pressure check.

TPMS is required by The National Highway Traffic Safety Administration on all vehicles produced after September 2007. Some earlier models may also come equipped with TPMS. Check your owner’s manual to be sure. According to the National Highway Traffic Safety Administration, TPMS is estimated to reduce the number of annual motor vehicle crash fatalities by about 120 and the annual number of injuries due to motor vehicle crashes by about 8,500, when all passenger vehicles are equipped with TPMS.

If you see your tire pressure light on, stop by your local Pep Boys for a free tire pressure check. You can find your recommended tire pressure in your owner’s manual or in the doorjamb of your driver’s side door.

Remember, TPMS is not a cure-all or a replacement for proper air pressure maintenance, it’s important to check your air pressure regularly. Vehicle aging and other factors can impact the system readings. Your car will handle better, save you gas, and you’ll be safer on the road.

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