BMW DTC P0669 – Control Module Internal Temperature Sensor ‘A’ Circuit High
DTC P0669 meaning on BMW
DTC P0669 on a BMW indicates an issue with the Control Module Internal Temperature Sensor ‘A’ Circuit registering a high voltage. This sensor is responsible for monitoring the internal temperature of the control module. When the voltage detected by the sensor is higher than the specified range, the DTC P0669 is triggered.
BMW DTC P0669 symptoms
Symptoms of DTC P0669 on a BMW may include:
- Check Engine Light (CEL) illuminated on the dashboard
- Engine running rough or misfiring
- Reduced engine performance
- Possible stalling or difficulty starting the engine
BMW DTC P0669 causes
The common causes of DTC P0669 on a BMW include:
- Faulty internal temperature sensor ‘A’
- Wiring or connection issues in the sensor circuit
- Defective control module
BMW DTC P0669 seriousness
While DTC P0669 may not always result in immediate drivability issues, it is important to address the underlying problem promptly. Ignoring this fault can lead to potential engine performance issues and may cause further damage to the vehicle over time.
How to diagnose DTC P0669 on BMW
To diagnose DTC P0669 on a BMW, a mechanic would typically perform the following steps:
- Use a diagnostic scanner to retrieve the fault code and freeze frame data
- Inspect the internal temperature sensor ‘A’ and its wiring for any visible damage or corrosion
- Test the sensor’s resistance and voltage output to determine if it is functioning correctly
- Check the control module for any signs of damage or malfunction
How to fix DTC P0669 on BMW
To fix DTC P0669 on a BMW, the following steps may be taken:
- Replace the faulty internal temperature sensor ‘A’ if it is found to be defective
- Repair any damaged wiring or connections in the sensor circuit
- If the control module is faulty, it may need to be replaced or reprogrammed
How to erase DTC P0669 on BMW
To erase DTC P0669 on a BMW, the fault code can be cleared using a diagnostic scanner. After the underlying issue has been addressed and fixed, the code can be reset to turn off the Check Engine Light and ensure that the vehicle’s onboard computer registers the problem as resolved.
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.