BMW DTC P173A – Pressure Control Solenoid ‘A’ Control Circuit Electrical
DTC P173A meaning on BMW
DTC P173A indicates an issue with the Pressure Control Solenoid ‘A’ Control Circuit Electrical in a BMW vehicle. This fault code is specific to the transmission system and points to a problem with the electrical circuit that controls the pressure solenoid ‘A’.
BMW DTC P173A symptoms
Symptoms of DTC P173A in a BMW may include harsh shifting, delayed gear engagement, transmission slipping, or the transmission going into limp mode. The vehicle may also exhibit poor acceleration and decreased fuel efficiency.
BMW DTC P173A causes
The common causes of DTC P173A in a BMW include a faulty pressure control solenoid ‘A’, damaged wiring or connectors in the control circuit, low transmission fluid level, or a malfunctioning transmission control module.
BMW DTC P173A seriousness
Ignoring DTC P173A in a BMW can lead to further damage to the transmission system, potentially resulting in complete transmission failure. It is important to address this issue promptly to prevent costly repairs and ensure the vehicle’s drivability and safety.
How to diagnose DTC P173A on BMW
To diagnose DTC P173A on a BMW, a mechanic would typically use a diagnostic scanner to retrieve the fault code and perform a thorough inspection of the transmission system. This may involve checking the wiring and connectors related to the pressure control solenoid ‘A’, testing the solenoid itself, and verifying the transmission fluid level and condition.
How to fix DTC P173A on BMW
Fixing DTC P173A on a BMW may involve replacing the pressure control solenoid ‘A’, repairing or replacing damaged wiring or connectors, ensuring the transmission fluid is at the correct level and in good condition, and resetting the transmission control module. It is recommended to follow the manufacturer’s repair procedures and use genuine parts to ensure proper functionality.
How to erase DTC P173A on BMW
After fixing the underlying issue causing DTC P173A on a BMW, the fault code can be erased using a diagnostic scanner. By clearing the code, the vehicle’s onboard computer will reset the transmission system’s parameters and monitor for any recurring issues. It is important to verify that the problem has been resolved before clearing the fault code.
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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