U0116 – BMW DTC

BMW DTC U0116 – Lost Communication With Coolant Temperature Control Module

DTC U0116 meaning on BMW

DTC U0116 on a BMW indicates a communication error between the vehicle’s engine control module (ECM) and the coolant temperature control module. This error code specifically points to a lost communication with the coolant temperature control module, which is responsible for monitoring and regulating the engine’s coolant temperature.

BMW DTC U0116 symptoms

Symptoms of a DTC U0116 on a BMW may include:

• Check Engine Light (CEL) illuminated on the dashboard
• Inaccurate or fluctuating coolant temperature readings on the gauge
• Engine overheating or running hotter than normal
• Reduced engine performance or efficiency

BMW DTC U0116 causes

The potential causes of a DTC U0116 on a BMW include:

• Faulty coolant temperature control module
• Wiring or connection issues between the ECM and the coolant temperature control module
• ECM software or hardware issues
• Faulty temperature sensor

BMW DTC U0116 seriousness

While a DTC U0116 may not directly affect the drivability of the vehicle, it is important to address this issue promptly to prevent potential engine damage due to overheating or incorrect temperature regulation. Ignoring this fault code could lead to more severe problems in the long run.

How to diagnose DTC U0116 on BMW

To diagnose a DTC U0116 on a BMW, a mechanic would typically perform the following steps:

1. Use a diagnostic scanner to retrieve the fault code and any related codes
2. Inspect the wiring and connections between the ECM and the coolant temperature control module
3. Test the functionality of the coolant temperature control module and temperature sensor
4. Check for any software updates or ECM issues

How to fix DTC U0116 on BMW

To fix a DTC U0116 on a BMW, the following steps may be taken:

1. Repair or replace any damaged wiring or connections
2. Replace the faulty coolant temperature control module or temperature sensor
3. Update the ECM software if necessary
4. Clear the fault code and perform a test drive to ensure the issue is resolved

How to erase DTC U0116 on BMW

To erase a DTC U0116 on a BMW, the fault code can be cleared using a diagnostic scanner. After addressing the underlying issue that caused the fault code, the mechanic can reset the code, and the Check Engine Light should turn off. It is important to verify that the issue has been resolved before clearing the fault code to prevent it from reoccurring.

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

Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.