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Re: Low tire pressure light stays on in spite of adequate...
Your wheel bearing needs replaced! You can have the abs diag and will tell you which whell bearing is bad. Soon your traction light and abs light will come on.
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I don't have your car, but most tire pressure systems seem to be based on rolling circumference of your tires. If one of your tires is smaller than the others, that triggers the sensor...
I would start by checking that all four of your tires have similar pressures, and that they're all the same size.
Normally, correcting low tire pressure will re-set the system and light will go off, however, if TPMS units inside wheels get low batteries, light will stay on. Very common for these units to be replaced when you buy new tires.
TPMS - TIRE PRESSURE MONITOR WARNING LIGHT NOTE: Tire pressure rises and falls depending on heat caused by vehicle's operation and the outside temperature. If outside temperature is low, the air inside the tire may cool, causing a lower tire inflation pressure. This may cause the low tire pressure warning light to illuminate.
When the tire pressure warning light comes on, immediately check the air pressure of all tires and adjust to the specified pressure. Make sure the warning light goes off. If the warning light stays on or flashes, there is a malfunction in the TPM system. See appropriate manufacturer service information.
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This (!) symbol is your
TIRE PRESSURE MONITORING SYSTEM (TPMS) warning light.
The manual has this to say about it:
This system monitors tire pressure. if the low tire pressure warning light
illuminates, check the tire pressure in all four tires.
Adjust the low tire pressure to the recommended cold tire pressure
shown on the Tire and Loading information label located in the driver's
door opening. After tire pressures are adjusted, the vehicle will need to
be driven at speeds above 16 MPH (25 km/h) to activate the TPMS and
turn off the low tire pressure warning light.
The tire pressure monitor system needs to be reset. The instructions for resetting are in the owner's manual. If you don't have a manual, please confirm year and model.
Your nissan also has a tire monitor on your spare tire if your spare has low pressure and the other 4 tires have correct pressure the light will stay on . after you ajust the spare also the light should go away.
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