BMW DTC P0948 – Hydraulic Pump Relay/Control Circuit High
DTC P0948 meaning on BMW
DTC P0948 on a BMW indicates a high voltage condition in the hydraulic pump relay/control circuit. This fault code is specific to the hydraulic pump relay or its control circuit in the transmission system.
BMW DTC P0948 symptoms
Symptoms of DTC P0948 in a BMW may include:
- Check Engine Light (MIL) illuminated
- Transmission shifting issues
- Reduced performance or drivability
BMW DTC P0948 causes
Common causes of DTC P0948 in a BMW include:
- Faulty hydraulic pump relay
- Short or open circuit in the control wiring
- Defective transmission control module (TCM)
BMW DTC P0948 seriousness
DTC P0948 should be addressed promptly as it can lead to transmission issues and affect the drivability of the vehicle. Ignoring this fault code may result in further damage to the transmission system.
How to diagnose DTC P0948 on BMW
To diagnose DTC P0948 on a BMW, a mechanic would typically perform the following steps:
- Use a diagnostic scanner to retrieve the fault code and related data
- Inspect the hydraulic pump relay and its wiring for any visible damage
- Check the control circuit for continuity and proper voltage levels
- Test the transmission control module (TCM) for proper operation
How to fix DTC P0948 on BMW
To fix DTC P0948 on a BMW, the following steps may be taken:
- Replace the faulty hydraulic pump relay if necessary
- Repair any damaged wiring in the control circuit
- Reset the fault code and test drive the vehicle to ensure the issue is resolved
How to erase DTC P0948 on BMW
To erase DTC P0948 on a BMW, the fault code can be cleared using a diagnostic scanner. After the repair has been made and the issue resolved, the code can be reset to turn off the Check Engine Light and ensure the fault does not reoccur.
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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