BMW DTC P023B – Charge Air Cooler Coolant Pump Control Circuit Low
DTC P023B meaning on BMW
The DTC P023B code on a BMW indicates an issue with the charge air cooler coolant pump control circuit. This code is triggered when the powertrain control module (PCM) detects a low voltage condition in the circuit that controls the charge air cooler coolant pump.
BMW DTC P023B symptoms
Symptoms of DTC P023B on a BMW may include reduced engine performance, decreased fuel efficiency, rough idling, and in some cases, the vehicle may go into a limp mode to prevent further damage.
BMW DTC P023B causes
The common causes of DTC P023B on a BMW include a faulty charge air cooler coolant pump, damaged wiring or connectors in the control circuit, or a malfunctioning PCM.
BMW DTC P023B seriousness
Ignoring DTC P023B on a BMW can lead to further damage to the engine and other components. It is important to address this issue promptly to prevent potential costly repairs.
How to diagnose DTC P023B on BMW
To diagnose DTC P023B on a BMW, a mechanic would typically use a diagnostic scanner to retrieve the fault codes stored in the PCM. They would then inspect the charge air cooler coolant pump, wiring, and connectors for any visible damage or loose connections.
How to fix DTC P023B on BMW
Fixing DTC P023B on a BMW may involve replacing the charge air cooler coolant pump if it is found to be faulty. Additionally, repairing any damaged wiring or connectors in the control circuit and ensuring proper connection can help resolve the issue.
How to erase DTC P023B on BMW
Once the underlying issue causing DTC P023B on a BMW has been fixed, the fault codes can be cleared using a diagnostic scanner. This will reset the PCM and turn off the check engine light.
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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