BMW DTC P0973 – Shift Solenoid ‘A’ Control Circuit Low
DTC P0973 meaning on BMW
DTC P0973 indicates a fault with the Shift Solenoid ‘A’ Control Circuit in a BMW vehicle. This fault code is triggered when the Powertrain Control Module (PCM) detects that the voltage signal from the shift solenoid ‘A’ control circuit is lower than the expected range.
BMW DTC P0973 symptoms
Symptoms of DTC P0973 in a BMW may include harsh shifting, delayed shifting, transmission slipping, transmission overheating, and in some cases, the transmission may go into a limp mode where it operates in a single gear only.
BMW DTC P0973 causes
The common causes of DTC P0973 in a BMW include a faulty shift solenoid ‘A’, damaged wiring or connectors in the shift solenoid circuit, low transmission fluid level, dirty or contaminated transmission fluid, or a malfunctioning PCM.
BMW DTC P0973 seriousness
Ignoring DTC P0973 in a BMW can lead to further damage to the transmission system, potentially resulting in costly repairs. It is important to address this issue promptly to prevent any long-term damage to the vehicle.
How to diagnose DTC P0973 on BMW
To diagnose DTC P0973 on a BMW, a mechanic would typically start by using a scan tool to retrieve the fault code and then perform a visual inspection of the shift solenoid ‘A’ and its wiring harness. They may also conduct tests to check the resistance of the solenoid and verify proper voltage signals.
How to fix DTC P0973 on BMW
Fixing DTC P0973 on a BMW involves replacing the faulty shift solenoid ‘A’ if it is determined to be the cause of the issue. Additionally, repairing any damaged wiring or connectors in the circuit, ensuring the transmission fluid level is correct, and performing a transmission fluid flush and filter replacement may be necessary.
How to erase DTC P0973 on BMW
After fixing the underlying issue causing DTC P0973 on a BMW, the fault code can be erased using a scan tool that has the capability to clear diagnostic trouble codes. This will reset the PCM and turn off the check engine light.
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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