I have a 2007 Grand Caravan. I began getting a message to service the tire pressure monitoring system soon. I thought that one of the batteries in the the sensors was going. Since I was getting new tires anyway, I bought 4 new sensors from NAPA and when the tires were replaced I had the new sensors installed.

I am still getting the message. I did not find anything using the search function. I've looked in the FSM and determined that the sensors do not need to be manually calibrated. I also did not find a thing about resetting the warning light. I also looked in the owner's manual for any additional information. Nothing.

Does the warning need to be reset? If so, how is it accomplished? Or, do I simply determine if one of the new sensors is bad or was damaged during installation?

Thanks for your help.

 

Is there a fault code stating which tire has low pressure?
Per the Service Manual, this is the diagnostic procedure to check the tire pressure sensor.
DIAGNOSIS AND TESTING - TIRE PRESSURE SENSOR
NOTE:Tire pressure may increase from 2 to 6 psi (14 to 41 kPa) during normal driving conditions. Do NOT reduce this normal pressure build up.
When diagnosing a tire pressure issue, always check air pressure in the tires first with a known accurate air gauge. Adjust air pressure as necessary to that listed on the Tire Inflation Pressure Label (Placard) provided with the vehicle (usually applied to the driver's side B-pillar). After adjusting air pressure in a tire on the vehicle, allow approximately two minutes for the message or indicator lamp to go out.
Check the tire pressure indicator lamp in the instrument cluster. If the lamp is illuminating continuously, proceed as listed below. If the indicator lamp is flashing on/off for 60 seconds, once every 10 minutes, there is a system fault detected. Refer to the appropriate diagnostic information.
If air pressure in any tire is low, inspect all the tires for leaks. A water “dunk tank” or other water test may be used to check for a leak around the sensor as long as any water at the valve core is removed once the procedure is completed. The water can be easily expelled from the core area by pushing in on the core for several seconds, allowing escaping air to drive out any moisture. Reinflate the tire as necessary. Always make sure the original valve stem cap is securely installed to keep moisture out of the sensor.
If the gauge-read pressure in the tires does not indicate a tire pressure issue, refer to the appropriate diagnostic information.