BMW DTC P145D – Secondary Air Injection System Air Flow/Pressure Sensor Initialization, Pressure Difference Between 2 Driving Cycles (Bank 2)
DTC P145D meaning on BMW
DTC P145D on a BMW refers to an issue with the Secondary Air Injection System Air Flow/Pressure Sensor Initialization, Pressure Difference Between 2 Driving Cycles on Bank 2. This diagnostic trouble code indicates that there is a discrepancy in the air flow or pressure readings from the sensor during two consecutive driving cycles.
BMW DTC P145D symptoms
Symptoms of DTC P145D on a BMW may include rough idling, engine misfires, decreased fuel efficiency, and in some cases, the Check Engine Light may illuminate on the dashboard.
BMW DTC P145D causes
The common causes of DTC P145D on a BMW can include a faulty air flow/pressure sensor, a vacuum leak in the secondary air injection system, clogged air injection passages, or issues with the air pump.
BMW DTC P145D seriousness
While DTC P145D may not cause immediate drivability issues, it is important to address this problem promptly to prevent potential damage to the engine or emissions system. Ignoring this code can lead to increased emissions, reduced engine performance, and potential catalytic converter damage.
How to diagnose DTC P145D on BMW
To diagnose DTC P145D on a BMW, a mechanic would typically start by using a diagnostic scanner to retrieve the fault codes stored in the vehicle’s computer. They would then inspect the secondary air injection system components, including the air flow/pressure sensor, air pump, and associated hoses, for any signs of damage or malfunction.
Additional tests may be performed to check the functionality of the sensor and ensure proper air flow through the system. Smoke tests can also be conducted to detect any vacuum leaks that may be causing the issue.
How to fix DTC P145D on BMW
Fixing DTC P145D on a BMW typically involves replacing the faulty air flow/pressure sensor, repairing any vacuum leaks, cleaning or replacing clogged air injection passages, or addressing any issues with the air pump. Once the root cause of the problem is identified, the necessary repairs can be made to resolve the code.
How to erase DTC P145D on BMW
After the necessary repairs have been completed to address DTC P145D on a BMW, the fault codes can be cleared using a diagnostic scanner. By clearing the codes, the Check Engine Light should turn off, indicating that the issue has been resolved. It is important to ensure that the repairs have been successful before clearing the fault codes.
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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