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.
Turbocharger Boost Pressure (TCBP) Sensor
The TCBP sensor is located in the intake air tube between the turbocharger and the charge air cooler (CAC). The TCBP sensor measures the throttle inlet pressure. The PCM uses the information from the TCBP sensor to refine the estimate of the airflow rate through the throttle and to determine the desired boost pressure. The TCBP sensor may be integrated with a charge air cooler temperature (CACT) sensor.
On some vehicles, the TCBP sensor or TCBP/CACT sensor has one digital signal output from the sensor. There is one reference voltage circuit and one signal return circuit for the sensor. For all others, the TCBP has one analog signal output from the sensor. The TCBP/CACT has two analog signal outputs from the sensor. There is one reference voltage circuit and one signal return circuit for the sensor.
Typical TCBP Sensor Integrated With A CACT 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.