Fault tire sensor monitor - 2008 Ford Explorer

Doesn't have a CJB , has SJB - smart junction box . Computer with fuse box in one .
Removal
NOTE: Prior to removal of the SJB, it is necessary to upload module configuration information to a scan tool.
NOTE: The tire pressure monitoring system (TPMS) functionality is integral to the SJB.
NOTE: A new SJB module is delivered in manufacturing mode with pre-set DTCs. These DTCs require that the TPMS sensor training procedure be carried out in order for the DTCs to be cleared. The pre-set DTCs are as follows:

• B2868 - Left Front Tire Pressure Sensor Fault
• B2869 - Right Front Tire Pressure Sensor Fault
• B2870 - Right Rear Tire Pressure Sensor Fault
• B2871 - Left Rear Tire Pressure Sensor Fault
• C2780 - ECU in Manufacturer Sub-State

1. Upload the module configuration information from the SJB. For additional information, refer to Section 418-01 .

1. Disconnect the battery. For additional information, refer to Section 414-01 .

1. Remove the floor console SJB cover.

1. Remove the transmission selector lever bezel from the floor console finish panel.

1. Apply the parking brake.

1. Remove the parking brake lever boot from the floor console finish panel.

1. Remove the floor console finish panel.

1. Remove the SJB screw.

1. Disconnect the electrical connectors and remove the SJB.

The "tire pressure sensor fault" message is an indication that there is a problem with the tire pressure monitoring system (TPMS). A tire pressure monitoring system is required for all motor vehicles manufactured after 2007. The pressurized air inside the tire is monitored by the TPMS. The TPMS consists of tire pressure sensors which are placed inside each wheel. These sensors provide the driver with information regarding the actual tire pressure of each tire in real time.
All car tires are tubeless, unlike bike tires that have an inner tube that when filled with air inflates the rubber tire. Tubeless car tires have an inner core that is filled with pressurized air. The tire should be filled based on the manufacturer's specified PSI. This can usually be found on a sticker on the driver's side door or trunk. If the tire is overinflated or underinflated, this could cause damage to the tire and/or hazardous driving conditions.
Problems that are possible when a tire is overinflated:

• Shorter lifespan of the tire
• Broken tire belt
• Uneven wear on the tread
• Bad traction-specifically in the rain and snow
• Difficult to steer and/or maneuver (it may feel as if you are driving on ice)
• Decreased friction
• Driver may experience a harsh ride
• Could cause damage to the suspension
• Tire may blowout/explode

Problems that are possible when a tire is underinflated:

• Shorter lifespan of the tire
• Make cause the tread to separate
• Premature wear on the tread
• Decreased fuel economy
• Difficult to steer and/or maneuver (it may feel harder to turn with precision)
• Increased friction
• Tire may blowout/explode

check the air pressure in tires if good need to check as to which tps sensor has failed order a new one and replaced usually a tire shop will charge a frw bucks to replace

That should be in your manual it should tell you how to reset it

As they are two completely separate systems, I would think you have a door switch issue (located inside of the door latch) and a TMPS sensor issue. Your local tire shop should be able to help with the TPMS sensor. For the door switch, you can try cleaning the switch with some contact cleaner, but I have found that it usually requires replacement of the latch to solve the issue of the ajar light.

Tire pressure sensors are just that, sensitive. If all your tire have the proper pressure and you still are seeing the sensor light and it comes back on after resetting it then the computer sensor monitor is at fault. Unless you can reset your cars' computer you will probably be stuck with going to the dealer for service. Call various other reputable service centers that have certified mechanics before turning out the big green at a FORD dealership though.

That signal is from your tire monitoring sensors, telling you that there is air pressure difference between tires. The tire pressure should be same in all tires.

The sensors are pretty dependable. You have to make sure that the tire pressures are on the money. Check the door jam for the correct front and rear pressures. Don't go by the tire, go by the door jam or owners manual. At times when the outside temperature changes a lot it can cause the light to come on.
You may want to check the tires for defects, punctures, or a bubble/s.

There is a loose connection on the body control module.

It is on the same button as the Trip Odometer. Cycle through until you see Tire Reset and hold the button down.