BMW DTC P1A87 – Motor Electronics Coolant Pump ‘A’ Supply Voltage Circuit Low
DTC P1A87 meaning on BMW
The Diagnostic Trouble Code (DTC) P1A87 for BMW refers to an issue with the Motor Electronics Coolant Pump ‘A’ Supply Voltage Circuit being detected as low. This code indicates that the power supply voltage to the coolant pump control module is below the specified threshold, causing a malfunction in the cooling system.
BMW DTC P1A87 symptoms
Symptoms of the BMW DTC P1A87 may include:
- Engine overheating
- Reduced engine performance
- Check Engine Light (CEL) illuminated on the dashboard
- Increased fuel consumption
BMW DTC P1A87 causes
Common causes of the BMW DTC P1A87 may include:
- Faulty coolant pump
- Wiring or connection issues in the coolant pump circuit
- Defective coolant pump control module
- Low voltage supply to the coolant pump
BMW DTC P1A87 seriousness
The DTC P1A87 for BMW should be addressed promptly as it can lead to engine overheating and potential damage if left unresolved. Ignoring this issue may result in costly repairs and further complications to the vehicle’s cooling system.
How to diagnose DTC P1A87 on BMW
To diagnose the DTC P1A87 on a BMW, you can perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes and identify the specific issue.
- Inspect the coolant pump and its connections for any visible damage or loose connections.
- Check the voltage supply to the coolant pump control module using a multimeter.
- Test the functionality of the coolant pump control module.
How to fix DTC P1A87 on BMW
To fix the DTC P1A87 on a BMW, you can follow these steps:
- Replace the faulty coolant pump if necessary.
- Repair any damaged wiring or connections in the coolant pump circuit.
- Replace the coolant pump control module if it is found to be defective.
- Ensure the proper voltage supply to the coolant pump is restored.
How to erase DTC P1A87 on BMW
To erase the DTC P1A87 on a BMW after the issue has been fixed, you can use a diagnostic scanner to clear the fault codes stored in the vehicle’s ECU. Once the codes are cleared, the Check Engine Light should turn off, indicating that the fault has been addressed.
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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