BMW DTC P146E – Charge Air Cooler Coolant Pump RPM Regulation, Excess Temperature
DTC P146E meaning on BMW
DTC P146E on a BMW indicates a fault related to the Charge Air Cooler Coolant Pump RPM Regulation, Excess Temperature. This fault code is triggered when the engine control module detects that the charge air cooler coolant pump is operating at a higher temperature than expected, potentially due to a malfunction or issue with the cooling system.
BMW DTC P146E symptoms
Symptoms of DTC P146E on a BMW may include:
- Check Engine Light illuminated
- Reduced engine performance
- Overheating of the charge air cooler system
- Increased fuel consumption
BMW DTC P146E causes
Common causes of DTC P146E on a BMW include:
- Malfunctioning charge air cooler coolant pump
- Low coolant level
- Coolant pump circuit issues
- Thermostat failure
BMW DTC P146E seriousness
DTC P146E should not be ignored as it can lead to engine overheating and potential damage if not addressed promptly. It is recommended to diagnose and fix the issue as soon as possible to prevent further complications.
How to diagnose DTC P146E on BMW
To diagnose DTC P146E on a BMW, you can perform the following steps:
- Use a diagnostic scanner to retrieve the fault code and freeze frame data
- Inspect the charge air cooler coolant pump for any visible signs of damage or leaks
- Check the coolant level and quality
- Test the coolant pump circuit for proper operation
- Inspect the thermostat for proper function
How to fix DTC P146E on BMW
To fix DTC P146E on a BMW, you can try the following solutions:
- Replace the malfunctioning charge air cooler coolant pump
- Top up the coolant level and ensure proper coolant mixture
- Repair any issues in the coolant pump circuit
- Replace the thermostat if found faulty
How to erase DTC P146E on BMW
To erase DTC P146E on a BMW, you can use a diagnostic scanner to clear the fault code after fixing the underlying issue. Once the fault code is cleared, you can monitor the system for any reoccurrence of the fault.
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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