The P0106 diagnostic trouble code indicates an issue with the pressure sensor (B28) and is caused when the Engine Control Module (ECM) detects an implausible signal from the sensor. Here are some steps that can help you fix the issue:
Check for vacuum leaks: Vacuum leaks in the intake system can cause false readings from the pressure sensor. Inspect the intake system for any cracks, holes, or loose connections. Repair or replace any damaged components.
Inspect the pressure sensor: Check the pressure sensor for any visible damage, such as cracks or broken wires. If there is damage, replace the pressure sensor.
Check the wiring: Inspect the wiring harness that connects the pressure sensor to the ECM for any visible damage, such as cracks or breaks in the insulation. Also, check the connectors for corrosion or debris. Repair or replace any damaged wires or connectors.
Check the ECM: Use a diagnostic scanner that can read fault codes and access the data from the ECM to check if it is receiving a signal from the pressure sensor. If there is no signal, the ECM may be malfunctioning. Replace the ECM if it is found to be faulty.
Clean the throttle body: A dirty throttle body can cause low airflow and create false pressure sensor readings. Clean the throttle body using a throttle body cleaner and a soft cloth.
Check the fuses: Check the fuses related to the pressure sensor system for any damage or blown fuses. Replace any damaged fuses.
Perform a road test: After performing the repair, take your vehicle for a road test to ensure that the fault code is not triggered again.
If the above steps do not resolve the issue, it is recommended to take your vehicle to a certified mechanic or dealership for further diagnosis and repair.
