BMW DTC P0985 – Shift Solenoid ‘E’ Control Circuit Low
DTC P0985 meaning on BMW
DTC P0985 indicates a fault in the Shift Solenoid ‘E’ control circuit on a BMW vehicle. The Powertrain Control Module (PCM) monitors the voltage signal from the shift solenoid and sets this diagnostic trouble code when it detects a low voltage condition.
BMW DTC P0985 symptoms
Symptoms of DTC P0985 on a BMW may include harsh shifting, delayed shifting, transmission slipping, or the transmission not shifting at all. The vehicle may also experience decreased fuel efficiency and overall performance issues.
BMW DTC P0985 causes
The most common causes of DTC P0985 on a BMW include a faulty shift solenoid ‘E’, damaged wiring or connectors in the control circuit, low transmission fluid level, or a malfunctioning PCM.
BMW DTC P0985 seriousness
Ignoring DTC P0985 on a BMW can lead to further damage to the transmission system and potentially result in complete transmission failure. It is important to address this issue promptly to prevent costly repairs.
How to diagnose DTC P0985 on BMW
To diagnose DTC P0985 on a BMW, a mechanic will typically use a scan tool to retrieve the trouble codes and perform a visual inspection of the shift solenoid ‘E’ and its wiring. They may also conduct voltage tests to determine the source of the low voltage condition.
How to fix DTC P0985 on BMW
Fixing DTC P0985 on a BMW may involve replacing the shift solenoid ‘E’, repairing or replacing damaged wiring or connectors, ensuring the transmission fluid level is correct, or reprogramming the PCM. It is recommended to follow the manufacturer’s diagnostic and repair procedures.
How to erase DTC P0985 on BMW
Once the underlying issue causing DTC P0985 on a BMW has been resolved, the diagnostic trouble code can be cleared using a scan tool. This will reset the PCM and turn off the Check Engine Light. It is important to verify that the issue has been fixed before clearing the 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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