Postby smj999smj » Thu Jul 03, 2014 9:51 pm
The blinking and going to steady "on" is an indication that there is a problem with the TPMS system. A scantool capable of reading BCM codes is needed to get the TPMS codes to help find out what the problem is. That said, most TPMS sensors tend to last 6-7 years before the batteries start to weaken or fail. The batteries in the sensors can not be replaced; you have to replace the entire sensor, which then means it has to be ID registered to the Keyless Entry/TPMS control unit. Note: if the TPMS sensors weren't re-registered at every tire rotation, the stored trouble code may indicate the wrong location. For example, let's assume we have a vehicle with TPMS sensors that are registered in their proper location. The tires are rotated front to back, but the sensors are not re-registered. The sensor at the left rear tire fails; the code stored will be for the left front sensor, the last registered location for that sensor. Most people don't have their TPMS sensors re-registered at every tire rotation, so if this is your case, you would have to re-register all the sensors, erase the codes, drive the vehicle about 20-25 miles to get the code to trigger and then address the code. Keep in mind that when one sensor fails, the others are usually not far behind. My advice is that if you have a code for one or more weak batteries, replace all 4 sensors with a set of Dorman TPMS sensors. You can get them from Rockauto.com for about $42 each, or half the price of Nissan sensors, and they come with a lifetime warranty. You will then still need to get the sensors installed and ID registered, something that requires a trigger tool and a capable scantool. Dealers can do this, of course, but many tire shops and some independent shops can do this, as well.