BMW DTC P0989 – Transmission Fluid Pressure Sensor/Switch ‘E’ Circuit Low
DTC P0989 meaning on BMW
DTC P0989 indicates a low circuit condition in the transmission fluid pressure sensor/switch ‘E’ for BMW vehicles. This fault code is triggered when the powertrain control module (PCM) detects that the signal voltage from the sensor/switch ‘E’ is below the expected range.
BMW DTC P0989 symptoms
Symptoms of DTC P0989 on a BMW may include harsh shifting, transmission slipping, delayed engagement, or the transmission going into limp mode. The vehicle may also display a Check Engine Light on the dashboard.
BMW DTC P0989 causes
The common causes of DTC P0989 on a BMW include a faulty transmission fluid pressure sensor/switch ‘E’, damaged wiring or connectors in the sensor circuit, low transmission fluid level, or internal transmission issues.
BMW DTC P0989 seriousness
Ignoring DTC P0989 on a BMW can lead to further transmission damage and potential drivability issues. It is important to address this fault code promptly to prevent more severe problems and ensure the vehicle’s proper operation.
How to diagnose DTC P0989 on BMW
To diagnose DTC P0989 on a BMW, a mechanic would typically start by using a diagnostic scanner to retrieve the fault codes stored in the PCM. They would then inspect the transmission fluid pressure sensor/switch ‘E’ and its wiring for any visible damage. Testing the sensor’s resistance and voltage output may also be necessary to pinpoint the issue accurately.
How to fix DTC P0989 on BMW
Fixing DTC P0989 on a BMW involves replacing the faulty transmission fluid pressure sensor/switch ‘E’ if it is determined to be the root cause. Additionally, repairing any damaged wiring or connectors in the sensor circuit and ensuring the transmission fluid level is correct can help resolve the issue. It is recommended to follow the manufacturer’s diagnostic and repair procedures for a comprehensive fix.
How to erase DTC P0989 on BMW
After fixing the underlying issue causing DTC P0989 on a BMW, the fault code can be erased using a diagnostic scanner. By clearing the code, the Check Engine Light should turn off, indicating that the problem has been addressed. It is essential to verify that the fault does not return after clearing the code to confirm the successful repair.
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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