BMW DTC P145B – Secondary Air Injection System Air Flow/Pressure Sensor Initialization, Pressure Out of Range (Bank 2)
DTC P145B meaning on BMW
DTC P145B on a BMW refers to a fault with the Secondary Air Injection System Air Flow/Pressure Sensor Initialization, specifically indicating that the pressure is out of range in Bank 2. This code is triggered when the engine control module detects that the pressure readings from the sensor are not within the expected parameters.
BMW DTC P145B symptoms
Symptoms of DTC P145B on a BMW may include rough idling, engine misfires, decreased engine performance, and potentially an illuminated check engine light on the dashboard. In some cases, there may be noticeable exhaust emissions or unusual noises coming from the engine compartment.
BMW DTC P145B causes
The most common causes of DTC P145B on a BMW include a faulty Secondary Air Injection System Air Flow/Pressure Sensor, a vacuum leak in the air injection system, clogged or restricted air injection system components, or issues with the air pump or related wiring.
BMW DTC P145B seriousness
While DTC P145B may not cause immediate drivability issues, it is important to address this fault promptly to prevent potential damage to the engine or emissions system. Ignoring this fault could lead to increased emissions, reduced fuel efficiency, and further complications down the line.
How to diagnose DTC P145B on BMW
To diagnose DTC P145B on a BMW, a mechanic would typically start by using a diagnostic scanner to retrieve the fault code and then perform a visual inspection of the air injection system components. They may also conduct tests on the air flow/pressure sensor, check for vacuum leaks, and inspect the air pump and related wiring for any issues.
How to fix DTC P145B on BMW
Fixing DTC P145B on a BMW usually involves replacing the faulty Secondary Air Injection System Air Flow/Pressure Sensor, addressing any vacuum leaks in the system, cleaning or replacing clogged components, or repairing any wiring issues. Once the root cause of the fault is identified and resolved, the fault code should be cleared from the engine control module.
How to erase DTC P145B on BMW
To erase DTC P145B on a BMW, a mechanic can use a diagnostic scanner to access the engine control module and clear the fault code. After the necessary repairs have been made to address the underlying issue, the fault code can be reset to turn off the check engine light and ensure that the system is functioning properly.
Recommended tools & DTC Scanners for BMW
Best Diagnostic App for modern BMWs: BimmerLink
Recommended Bluetooth adapter for Bimmerlink: OBDLink CX
Cable adapter for Bimmerlink: Enet Cable USB Type C
For older BMWs we recommend: Autel AutoLink AL319 (2024 version)
Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter
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