BMW DTC P1696 – Main Relay Control Circuit Low
DTC P1696 meaning on BMW
The Diagnostic Trouble Code (DTC) P1696 for BMW refers to the Main Relay Control Circuit Low. This code indicates that the engine control module (ECM) has detected a low voltage condition in the main relay control circuit.
BMW DTC P1696 symptoms
Symptoms of DTC P1696 on a BMW may include:
- Engine stalling or not starting
- Intermittent starting issues
- Check Engine Light (CEL) illuminated on the dashboard
- Reduced engine performance
BMW DTC P1696 causes
The main causes of DTC P1696 on a BMW can include:
- Faulty main relay
- Wiring issues in the main relay control circuit
- Loose or corroded electrical connections
- ECM malfunction
BMW DTC P1696 seriousness
DTC P1696 should be addressed promptly as it can lead to potential starting and engine performance issues. Ignoring this code may result in the vehicle becoming unreliable or unsafe to drive.
How to diagnose DTC P1696 on BMW
To diagnose DTC P1696 on a BMW, you can follow these steps:
- Use a diagnostic scanner to retrieve the fault codes stored in the ECM.
- Inspect the main relay and its connections for any visible damage or corrosion.
- Check the wiring harness for any signs of wear or damage.
- Test the main relay and related components for proper functionality.
How to fix DTC P1696 on BMW
To fix DTC P1696 on a BMW, you can try the following:
- Replace the faulty main relay if necessary.
- Repair any damaged wiring or connections in the main relay control circuit.
- Clean or tighten any loose electrical connections.
- If the ECM is suspected to be faulty, have it tested or replaced by a professional.
How to erase DTC P1696 on BMW
To erase DTC P1696 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 code, clearing the code will reset the Check Engine Light and allow the vehicle to operate normally.
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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