P3198 – BMW DTC

BMW DTC P3198 – Engine Coolant Temperature 1 Gradient Too High

DTC P3198 meaning on BMW

DTC P3198 on a BMW indicates that the Engine Coolant Temperature 1 Gradient is too high. This means that there is a significant difference in temperature readings between various engine coolant temperature sensors, causing the system to detect a fault.

BMW DTC P3198 symptoms

Symptoms of DTC P3198 on a BMW may include:

• Check Engine Light illuminated
• Engine running hotter or colder than normal
• Reduced engine performance
• Possible overheating issues

BMW DTC P3198 causes

Common causes of DTC P3198 on a BMW include:

• Defective engine coolant temperature sensors
• Wiring or connection issues in the coolant temperature sensor circuit
• Coolant system problems such as air pockets or low coolant level
• Faulty engine control module (ECM)

BMW DTC P3198 seriousness

DTC P3198 should not be ignored as it can lead to potential engine damage if the coolant temperature is not properly regulated. It is important to address this issue promptly to prevent overheating or other related problems.

How to diagnose DTC P3198 on BMW

To diagnose DTC P3198 on a BMW, you can perform the following steps:

1. Use a diagnostic scanner to retrieve the fault code and freeze frame data
2. Inspect the engine coolant temperature sensors and their wiring for any visible damage
3. Check the coolant level and system for any leaks or air pockets
4. Perform a thorough inspection of the cooling system components

How to fix DTC P3198 on BMW

To fix DTC P3198 on a BMW, you can try the following solutions:

1. Replace any faulty engine coolant temperature sensors
2. Repair or replace any damaged wiring or connections in the sensor circuit
3. Ensure the coolant system is properly filled and bled of any air pockets
4. If necessary, replace the engine control module (ECM)

How to erase DTC P3198 on BMW

To erase DTC P3198 on a BMW, you can use a diagnostic scanner to clear the fault code from the ECM’s memory. After addressing the underlying issue and making the necessary repairs, you can then reset the system to remove the fault code.

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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