The OBD code P1408 for BMW indicates an issue with the Fuel Level Sensor circuit.
Symptoms include the Engine Light being ON.
This code is commonly caused by a faulty Fuel Level Sensor, open or shorted sensor harness, or poor electrical connection.
It is important to address this issue promptly to avoid inaccurate fuel level readings.
A possible fix involves inspecting the wiring harness and connectors for any damage or corrosion.
| Repair Importance Level | 10.0 (Out of 10) |
| Estimated Repair Time | Approximately 1.0 hour |
| Repair Difficulty Level | 10.0 (Out of 10) |
Symptoms of the Bmw p1408 OBD Code
The vehicle may experience rough idling, poor acceleration, and increased fuel consumption with code BMW P1408.
- Symptoms: Engine Light ON.
- Rough idle may be experienced.
- Loss of power during acceleration.
- Engine may hesitate or stumble.
Causes of the Bmw p1408 OBD Code
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Possible triggers for BMW P1408 include faulty EGR valve, clogged EGR passages, or wiring issues.
- P1408 can be caused by a faulty Fuel Level Sensor.
- A Fuel Level Sensor harness that is open or shorted.
- A Fuel Level Sensor circuit with poor electrical connection.
Fixing Bmw Error Code p1408 Step By Step
To address BMW fault code P1408, inspect and clean the EGR valve and associated components.
- To fix BMW OBDII code P1408, first, review the ‘Possible Causes’ mentioned above and visually examine the corresponding wiring harness and connectors.
- Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.
- Next, check the operation of the EGR valve and ensure it is functioning correctly.
- Clean the EGR valve and passages if there is carbon buildup.
- If the issue persists, consider replacing the EGR valve.
- Finally, reset the fault codes and perform a test drive to verify that the code does not return.
Cost Of Fixing Bmw p1408 Fault Code
Diagnosing and repairing BMW P1408 may involve testing and replacing components related to the EGR system.
The cost to diagnose and fix the BMW OBD code P1408 depends on the estimated 1. 0hour repair time.
Labor rates usually range from $75 to $150 per hour, so the total cost could be between $75 and $150. The final cost may vary based on shop rates and the complexity of the repair.
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Details of the Bmw p1408 OBD Code
BMW P1408 indicates an issue with the EGR system’s flow being out of range.
Code P1408 for BMW vehicles indicates a fault with the EGR (Exhaust Gas Recirculation) system.
This code is triggered when the EGR valve position sensor detects a voltage signal that is out of the specified range set by the ECM (Engine Control Module).
The ECM monitors the EGR system to ensure proper operation and emission control.
When the sensor reports a voltage signal that is not within the expected parameters, it triggers the P1408 fault code.
This code typically points to issues with the EGR valve, EGR valve position sensor, wiring, or related components in the EGR system.
Mechanic’s Tech Notes
Detailed information on BMW fault code P1408, including symptoms, causes, and diagnostic procedures.
To diagnose and fix OBDII code BMW P1408, start by visually inspecting the wiring harness and connectors related to the transmission control module (TCM).
Look for any damaged components and check connector pins for signs of damage or corrosion.
Use a multimeter to test TCM power and ground connections.
Additionally, use a scan tool to check if the TCM responds over the Controller Area Network (CAN) network.
If necessary, consider reprogramming or reflashing the TCM.
This comprehensive approach will help identify and address issues causing the P1408 fault code.
FAQ
Common symptoms of OBD code P1408 in a BMW: Engine Light ON, caused by faulty Fuel Level Sensor or related wiring issues. Inspect and repair as needed.
OBD code P1408 in BMW cars is typically caused by a faulty fuel level sensor, open/shorted harness, or poor electrical connection. Inspect and repair wiring/connectors.
Diagnose and fix OBD code P1408 in your BMW by checking the fuel level sensor, harness, and connections for faults. Inspect for damage or corrosion.
Wrap Up
If your BMW is displaying OBD code P1408, you may experience rough idling, poor engine performance, or even stalling.
This code typically indicates an issue with the EGR valve position sensor circuit, such as a faulty sensor, damaged wiring, or poor connections.
To address BMW OBD code P1408, start by inspecting the EGR valve position sensor and its wiring harness for any signs of damage or corrosion.
Test the sensor’s resistance and ensure proper voltage supply.
Replace the sensor if necessary and repair any wiring issues to resolve the fault.
