P3140 – BMW DTC

BMW DTC P3140 – Cylinder 11 High Pressure Injector Low Side Circuit Open

DTC P3140 meaning on BMW

The Diagnostic Trouble Code (DTC) P3140 for BMW indicates an issue with the Cylinder 11 High Pressure Injector Low Side Circuit Open. This means that there is a problem with the electrical circuit that controls the high-pressure fuel injector for cylinder 11 in the engine.

BMW DTC P3140 symptoms

Symptoms of the BMW DTC P3140 may include:

• Engine misfires
• Loss of power
• Rough idling
• Decreased fuel efficiency
• Check Engine Light (CEL) illuminated on the dashboard

BMW DTC P3140 causes

Common causes of the BMW DTC P3140 include:

• Faulty high-pressure fuel injector
• Wiring or connector issues in the injector circuit
• ECU (Engine Control Unit) malfunction
• Injector driver module failure

BMW DTC P3140 seriousness

Ignoring the BMW DTC P3140 can lead to potential engine performance issues and may cause further damage to the vehicle over time. It is recommended to address this issue promptly to prevent any long-term consequences.

How to diagnose DTC P3140 on BMW

To diagnose the DTC P3140 on a BMW, you can follow these steps:

1. Use a diagnostic scanner to retrieve the fault codes from the vehicle’s ECU.
2. Inspect the wiring and connectors related to the high-pressure injector for cylinder 11.
3. Test the high-pressure injector for proper operation.
4. Check the ECU and injector driver module for any faults.

How to fix DTC P3140 on BMW

To fix the DTC P3140 on a BMW, you can consider the following actions:

1. Replace the faulty high-pressure fuel injector for cylinder 11.
2. Repair or replace any damaged wiring or connectors in the injector circuit.
3. If the ECU or injector driver module is faulty, have them repaired or replaced by a professional.
4. Clear the fault codes using a diagnostic scanner after the repairs have been completed.

How to erase DTC P3140 on BMW

To erase the DTC P3140 on a BMW, you can use a diagnostic scanner to clear the fault codes stored in the ECU. Follow these steps:

1. Connect the diagnostic scanner to the vehicle’s OBD-II port.
2. Select the option to erase fault codes from the ECU.
3. Confirm the action and wait for the scanner to clear the DTC P3140.
4. Once the fault code has been erased, you can verify that the issue has been resolved by checking for any reoccurring codes or symptoms.

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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