jlobato01

We just bought a 2003 Impala and put on 18 inch rims with 245/45/18 tires. It still rides smooth but now our "low tire pressure" warning light turns on and stays lit. What can I do?

GMMerlin

Turn ON the ignition, with the engine OFF.
Cycle the exterior lamp switch from OFF to parking lamps 3 times within 5 seconds
After resetting, the TPM system requires up to 30 minutes of straight line driving in each of the 3 speed ranges to complete the calibration process
24-64 km/h (15-40 mph)
64-113 km/h (40-70 mph)
113-145 km/h (70-90 mph)

__________________
Why do you never have enough time or money to do the job right the first time, but enough time and money to do it again?
Got all the certifications
25 years ASE Certified Master Technician
GM WCT
Yea..I work at a DEALERSHIP....got a problem with that?

Gems

Where are the pressure monitoring sensors located? I thought they were inside the tires attached to the wheels? If so don't they have to be relocated onto the new wheels?

__________________
Go Mark Martin!

GMMerlin

The Tire Pressure Monitor (TPM) system alerts the driver when a large change in the pressure of one tire exists while the vehicle is being driven. The TPM system uses the Electronic Brake Control Module (EBCM), ABS wheel speed sensor inputs, class 2 serial data circuit, and the Instrument Panel Cluster (IPC) message center to perform the system functions. The EBCM contains the software to calculate relative tire pressure differences.

__________________
Why do you never have enough time or money to do the job right the first time, but enough time and money to do it again?
Got all the certifications
25 years ASE Certified Master Technician
GM WCT
Yea..I work at a DEALERSHIP....got a problem with that?

Gems

Good information... I still don't know where the sensors are that physically monitor the tire pressure... Aren't they located inside the wheels/tires?

__________________
Go Mark Martin!

bigrod118

no it uses the abs sensors which are located on the hub, it senses when one wheel is spinning fast/slower than the others and then throws the LTP code.

if you have the DISP button on your radio it can reset the message too.

hennigm4

Reset it using your "stock" radio. Turn car off, turn radio off, turn key to ACC. Push and hold the lower knob that says DISP for 10 seconds, your radio display should then say something like "settings" use the buttons directly below the power button to scroll through the menu, get to tire monitor(or similar) push the # 2 button till reset shows up then push the DISP button again. You can re program alarm functions , light functions, add fobs ect using the radio.