BMW DTC P0E79 – Coolant Bypass Valve ‘A’ Control Stuck/Open
DTC P0E79 meaning on BMW
The DTC P0E79 error code on a BMW indicates an issue with the Coolant Bypass Valve ‘A’ control circuit. This fault code is triggered when the Engine Control Module (ECM) detects that the control for the coolant bypass valve is stuck open or not functioning properly.
BMW DTC P0E79 symptoms
Some common symptoms associated with the BMW DTC P0E79 error code may include:
- Engine overheating
- Decreased fuel efficiency
- Check Engine Light (CEL) illuminated on the dashboard
- Reduced engine performance
BMW DTC P0E79 causes
The potential causes of the BMW DTC P0E79 error code include:
- Malfunctioning Coolant Bypass Valve ‘A’
- Wiring or connector issues in the coolant bypass valve circuit
- Faulty Engine Control Module (ECM)
BMW DTC P0E79 seriousness
Ignoring the DTC P0E79 error code on a BMW can lead to serious consequences such as engine overheating, potential damage to engine components, and reduced overall vehicle performance. It is crucial to address this issue promptly to prevent further damage.
How to diagnose DTC P0E79 on BMW
To diagnose the DTC P0E79 error code on a BMW, you can perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes stored in the ECM.
- Inspect the coolant bypass valve ‘A’ and its wiring for any visible damage or corrosion.
- Test the continuity of the wiring and connectors in the coolant bypass valve circuit.
- Check the operation of the coolant bypass valve using a multimeter.
How to fix DTC P0E79 on BMW
To fix the DTC P0E79 error code on a BMW, you can follow these steps:
- Replace the Coolant Bypass Valve ‘A’ if it is found to be faulty.
- Repair or replace any damaged wiring or connectors in the coolant bypass valve circuit.
- If necessary, reprogram or replace the Engine Control Module (ECM).
How to erase DTC P0E79 on BMW
To erase the DTC P0E79 error code on a BMW, you can use a diagnostic scanner to clear the fault codes stored in the ECM. After addressing the underlying issue causing the fault code, clearing the codes will reset the Check Engine Light and ensure that the repair was successful.
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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