BMW DTC P1408 – Fuel Level Signal 2
DTC P1408 meaning on BMW
The Diagnostic Trouble Code (DTC) P1408 for BMW refers to an issue with the Fuel Level Signal 2. This code indicates that there is a problem with the signal being received from the fuel level sensor 2 in the vehicle’s fuel system.
BMW DTC P1408 symptoms
Symptoms of DTC P1408 on a BMW may include inaccurate fuel level readings on the dashboard, fluctuating fuel gauge readings, or the fuel gauge not working at all. In some cases, the Check Engine Light may also illuminate on the dashboard.
BMW DTC P1408 causes
The common causes of DTC P1408 on a BMW include a faulty fuel level sensor 2, wiring issues in the fuel level sensor circuit, or a problem with the vehicle’s Engine Control Module (ECM) that is responsible for interpreting the fuel level signal.
BMW DTC P1408 seriousness
While DTC P1408 is not a critical issue that affects the drivability of the vehicle, it can lead to inconvenience due to inaccurate fuel level readings. It is important to address this issue to ensure proper monitoring of the fuel level in the vehicle.
How to diagnose DTC P1408 on BMW
To diagnose DTC P1408 on a BMW, a mechanic would typically use a diagnostic scanner to retrieve the fault codes stored in the vehicle’s ECM. They would then inspect the fuel level sensor 2 and its wiring for any visible damage or corrosion. Testing the sensor’s resistance and checking for proper voltage signals can help pinpoint the issue.
How to fix DTC P1408 on BMW
Fixing DTC P1408 on a BMW usually involves replacing the faulty fuel level sensor 2. The sensor is typically located inside the fuel tank and may require the tank to be removed for replacement. Ensuring that the wiring connections are secure and free of corrosion is also important. After replacing the sensor, clearing the fault codes and performing a test drive to verify proper fuel level readings is recommended.
How to erase DTC P1408 on BMW
To erase DTC P1408 on a BMW, a diagnostic scanner capable of clearing fault codes is needed. The mechanic would connect the scanner to the vehicle’s OBD-II port and navigate to the option to clear fault codes. Once the DTC P1408 is successfully cleared, the Check Engine Light should turn off, indicating that the issue 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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