U1157 – BMW DTC

BMW DTC U1157 – Message Monitoring Engine Control Torque 1 Plausibility

DTC U1157 meaning on BMW

The DTC U1157 on a BMW refers to ¨Message Monitoring Engine Control Torque 1 Plausibility.¨ This diagnostic trouble code indicates that there is a discrepancy or implausibility detected in the data communication related to engine control torque monitoring.

BMW DTC U1157 symptoms

Symptoms of the BMW DTC U1157 may include:

• Check Engine Light (MIL) illuminated on the dashboard
• Reduced engine performance or power loss
• Unusual engine behavior or rough idling

BMW DTC U1157 causes

Possible causes of the BMW DTC U1157 include:

• Issues with the engine control module (ECM)
• Problems with the torque monitoring sensors or circuits
• Intermittent wiring or connection issues

BMW DTC U1157 seriousness

The seriousness of the DTC U1157 on a BMW depends on the underlying cause. Ignoring this code can lead to potential engine performance issues and may affect the overall drivability of the vehicle. It is recommended to address this code promptly to prevent further damage.

How to diagnose DTC U1157 on BMW

To diagnose the DTC U1157 on a BMW, a mechanic would typically perform the following steps:

1. Use a diagnostic scanner to retrieve the fault codes and freeze frame data
2. Inspect the torque monitoring system components for any visible damage or loose connections
3. Check the wiring harness and connectors for continuity and proper voltage
4. Perform a thorough inspection of the engine control module (ECM) and related components

How to fix DTC U1157 on BMW

To fix the DTC U1157 on a BMW, the following steps may be taken:

1. Address any underlying issues with the engine control module (ECM) or torque monitoring system
2. Repair or replace any faulty sensors, circuits, or wiring related to engine control torque monitoring
3. Clear the fault codes using a diagnostic scanner after the repairs have been completed
4. Perform a test drive to ensure that the issue has been resolved and the DTC U1157 does not reappear

How to erase DTC U1157 on BMW

To erase the DTC U1157 on a BMW, follow these steps:

1. Connect a diagnostic scanner to the vehicle’s OBD-II port
2. Select the option to clear fault codes or reset the system
3. Wait for the scanner to communicate with the vehicle’s ECM and complete the clearing process
4. Verify that the DTC U1157 has been successfully erased by checking for any remaining fault codes

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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