BMW DTC U1170 – Coolant Pump Communication Error
DTC U1170 meaning on BMW
The DTC U1170 on a BMW indicates a communication error related to the coolant pump. This error code is specifically associated with issues in the communication system between the engine control module (ECM) and the coolant pump control module.
BMW DTC U1170 symptoms
Symptoms of the DTC U1170 on a BMW may include:
- Check Engine Light (CEL) illuminated on the dashboard
- Engine overheating
- Loss of coolant
- Reduced engine performance
BMW DTC U1170 causes
The DTC U1170 on a BMW can be caused by various factors, including:
- Faulty coolant pump
- Wiring or connection issues between the ECM and coolant pump control module
- Defective ECM or coolant pump control module
- Low coolant level
BMW DTC U1170 seriousness
The DTC U1170 should be addressed promptly as it can lead to engine overheating and potential damage if left unresolved. Ignoring this error code may result in costly repairs and possible engine failure.
How to diagnose DTC U1170 on BMW
To diagnose the DTC U1170 on a BMW, a mechanic would typically perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes
- Inspect the coolant pump and related components for any visible damage or leaks
- Check the wiring and connections between the ECM and coolant pump control module
- Test the functionality of the coolant pump and control module
How to fix DTC U1170 on BMW
To fix the DTC U1170 on a BMW, the following steps may be taken:
- Replace the faulty coolant pump if necessary
- Repair any damaged wiring or connections between the ECM and coolant pump control module
- Replace the ECM or coolant pump control module if they are found to be defective
- Ensure the coolant level is topped up and there are no leaks in the system
How to erase DTC U1170 on BMW
To erase the DTC U1170 on a BMW, a diagnostic scanner can be used to clear the fault codes stored in the ECM. After addressing and fixing the underlying issue causing the error code, the scanner can be used to erase the code from the system.
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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