P1559 – BMW DTC

BMW DTC P1559 – Cold Start Monitoring Integrated Moment Reserve not Reached

DTC P1559 meaning on BMW

DTC P1559 on a BMW refers to the ¨Cold Start Monitoring Integrated Moment Reserve not Reached¨ fault code. This code indicates that the engine control module (ECM) has detected an issue with the integrated moment reserve not being reached during cold start monitoring.

BMW DTC P1559 symptoms

Symptoms of DTC P1559 on a BMW may include:

• Hard starting
• Rough idle during cold starts
• Reduced engine performance
• Check Engine Light (CEL) illuminated on the dashboard

BMW DTC P1559 causes

The possible causes of DTC P1559 on a BMW include:

• Faulty intake air temperature sensor
• Issues with the engine coolant temperature sensor
• Problems with the fuel system
• Malfunctioning throttle body

BMW DTC P1559 seriousness

While DTC P1559 may not always result in immediate drivability issues, it is important to address this fault code promptly to prevent potential long-term damage to the engine and emissions system. Ignoring the issue could lead to decreased fuel efficiency and overall performance.

How to diagnose DTC P1559 on BMW

To diagnose DTC P1559 on a BMW, a mechanic would typically perform the following steps:

1. Use a diagnostic scanner to retrieve the fault code and freeze frame data
2. Inspect the intake air temperature sensor and engine coolant temperature sensor for proper operation
3. Check the fuel system components for any issues
4. Inspect the throttle body for proper functioning

How to fix DTC P1559 on BMW

To fix DTC P1559 on a BMW, the following steps may be taken:

1. Replace the faulty intake air temperature sensor or engine coolant temperature sensor
2. Clean or replace any clogged fuel system components
3. Repair or replace a malfunctioning throttle body
4. Clear the fault code and reset the ECM

How to erase DTC P1559 on BMW

To erase DTC P1559 on a BMW, the fault code can be cleared using a diagnostic scanner. After addressing the underlying issue that caused the fault code, the ECM can be reset to clear the code from the system. This should be done following the repair and verification that the issue has been resolved.

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.