P1622 – BMW DTC

BMW DTC P1622 – Map Cooling Thermostat Control Circuit Electrical

DTC P1622 meaning on BMW

The Diagnostic Trouble Code (DTC) P1622 for BMW refers to an issue with the Map Cooling Thermostat Control Circuit Electrical. This code indicates that there is a malfunction in the electrical circuit that controls the map cooling thermostat in the vehicle.

BMW DTC P1622 symptoms

Symptoms of DTC P1622 on a BMW may include:

• Engine overheating
• Check Engine Light (CEL) illuminated on the dashboard
• Reduced engine performance
• Poor fuel efficiency

BMW DTC P1622 causes

The common causes of DTC P1622 on a BMW include:

• Faulty map cooling thermostat
• Wiring or connector issues in the thermostat control circuit
• Defective engine coolant temperature sensor
• Software or programming issues

BMW DTC P1622 seriousness

DTC P1622 should be addressed promptly as it can lead to engine overheating and potential damage if left unresolved. Ignoring this code may result in further engine problems and reduced vehicle performance.

How to diagnose DTC P1622 on BMW

To diagnose DTC P1622 on a BMW, you can follow these steps:

1. Use a diagnostic scanner to retrieve the fault codes stored in the vehicle’s computer.
2. Inspect the map cooling thermostat and its wiring for any visible damage or corrosion.
3. Check the engine coolant temperature sensor for proper operation.
4. Perform a thorough inspection of the thermostat control circuit for any loose connections or shorts.

How to fix DTC P1622 on BMW

To fix DTC P1622 on a BMW, you can try the following solutions:

1. Replace the faulty map cooling thermostat with a new one.
2. Repair or replace any damaged wiring or connectors in the thermostat control circuit.
3. Check and replace the engine coolant temperature sensor if necessary.
4. Update the vehicle’s software or programming to address any potential issues.

How to erase DTC P1622 on BMW

To erase DTC P1622 on a BMW, you can clear the fault codes using a diagnostic scanner. After fixing the underlying issue causing the code, you can reset the codes to turn off the Check Engine Light and ensure that the problem 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

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