Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Pinpoint Test I: DTC B106B - Tire Pressure Sensor Low Battery
2010 Ford Ranger 2WD L4-2.3LSECTION Pinpoint Test I: DTC B106B - Tire Pressure Sensor Low Battery
Tire Pressure Monitoring System
Pinpoint Tests
Pinpoint Test I: DTC B106B - Tire Pressure Sensor Low Battery
Normal Operation
If there is a fault in the Tire Pressure Monitoring System (TPMS), such as a damaged or missing sensor(s), damaged module or a communication issue within the vehicle, DTCs are set in the Smart Junction Box (SJB), the TPMS warning indicator will flash for 70 seconds and then remain ON solid when the ignition switch is turned to the ON position and the message center (if equipped) will display TIRE PRESSURE SENSOR FAULT.
The tire pressure sensor is battery powered.
This DTC may be set when attempting to train a tire pressure sensor(s) with a low battery.
- DTC B106B (Tire Pressure Sensor Low Battery) - The pressure sensors are battery powered. If the battery is low and the sensors are trained, DTC B106B may be set. Also, if a new SJB is installed and one or more sensors have low batteries, DTC B106B may be set.
This pinpoint test is intended to diagnose the following:
- Tire pressure sensor battery
- Tire pressure sensor(s)
- SJB
PINPOINT TEST I: DTC B106B - TIRE PRESSURE SENSOR LOW BATTERY
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I1 DETERMINE WHICH SENSOR HAS A LOW BATTERY
- Train all 4 tire pressure sensors. Refer to Tire Pressure Monitoring System (TPMS) Sensor Training Tire Pressure Monitoring System (TPMS) Sensor Training.
- Did all of the tire pressure sensors transmit correctly and did the horn sound when each tire pressure sensor transmitted to the SJB?
Yes
CLEAR the DTCs. REPEAT the self-test. VERIFY system operation.
No
Before installing a new sensor(s): If a sensor(s) does not respond to the activation tool, ATTEMPT to activate the same sensor(s) with the activation tool. If the sensor(s) still does not respond, MOVE the vehicle to rotate the wheels at least one-fourth of a turn and ATTEMPT to activate the same sensor(s) again.
If the sensor(s) fail to train a second time, INSTALL a new tire pressure sensor(s). REFER to Tire Pressure Monitoring System (TPMS) Sensor Tire Pressure Monitoring System (TPMS) Sensor.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.