P103B – BMW DTC

BMW DTC P103B – Cold Start Intake Air Temperature Too High (Bank 2)

DTC P103B meaning on BMW

DTC P103B is a diagnostic trouble code that indicates the Cold Start Intake Air Temperature is too high on Bank 2 in a BMW vehicle. This code is specific to BMW vehicles and is related to the intake air temperature sensor readings during cold start conditions.

BMW DTC P103B symptoms

Symptoms of DTC P103B in a BMW may include:

• Check Engine Light illuminated
• Reduced engine performance
• Potential rough idling or stalling

BMW DTC P103B causes

The possible causes of DTC P103B in a BMW include:

• Faulty intake air temperature sensor
• Wiring or connector issues related to the sensor
• Intake air leaks
• Engine coolant temperature sensor problems

BMW DTC P103B seriousness

While DTC P103B may not always result in immediate drivability issues, it is important to address this code promptly to prevent potential engine performance problems and to ensure proper emissions control.

How to diagnose DTC P103B on BMW

To diagnose DTC P103B on a BMW, you can follow these steps:

1. Use a diagnostic scanner to retrieve the fault code and freeze frame data
2. Inspect the intake air temperature sensor and its wiring for any visible damage
3. Check for any intake air leaks or issues with the engine coolant temperature sensor
4. Perform a thorough visual inspection of the intake air system components

How to fix DTC P103B on BMW

To fix DTC P103B on a BMW, you can try the following:

1. Replace the faulty intake air temperature sensor
2. Repair any damaged wiring or connectors related to the sensor
3. Address any intake air leaks or engine coolant temperature sensor problems
4. Clear the fault code and test drive the vehicle to ensure the issue is resolved

How to erase DTC P103B on BMW

To erase DTC P103B on a BMW, you can use a diagnostic scanner to clear the fault code from the vehicle’s memory. After fixing the underlying issue causing the code, clearing the code will reset the Check Engine Light and ensure the system is monitoring properly.

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.