U0466 – BMW DTC

BMW DTC U0466 – Invalid Data Received From HVAC Control Module – Rear

DTC U0466 meaning on BMW

DTC U0466 on a BMW indicates that the Engine Control Module (ECM) has detected invalid data coming from the Heating, Ventilation, and Air Conditioning (HVAC) Control Module for the rear of the vehicle. This error code typically points to a communication issue between the ECM and the HVAC control module.

BMW DTC U0466 symptoms

Symptoms of DTC U0466 on a BMW may include:

• Malfunctioning rear HVAC system
• Inconsistent temperature control in the rear of the vehicle
• Dashboard warning light related to HVAC system

BMW DTC U0466 causes

The common causes of DTC U0466 on a BMW are:

• Faulty HVAC control module
• Wiring or connection issues between the ECM and HVAC control module
• Software glitches in the HVAC control module

BMW DTC U0466 seriousness

While DTC U0466 may not directly affect the drivability of the vehicle, it can lead to discomfort for passengers due to HVAC system malfunctions. It is recommended to address this issue to ensure proper functioning of the rear HVAC system.

How to diagnose DTC U0466 on BMW

To diagnose DTC U0466 on a BMW, follow these steps:

1. Use a diagnostic scanner to retrieve the fault codes stored in the ECM.
2. Inspect the wiring and connections between the ECM and HVAC control module for any damage or corrosion.
3. Check the HVAC control module for any software updates or malfunctions.

How to fix DTC U0466 on BMW

To fix DTC U0466 on a BMW, consider the following:

1. Repair or replace any damaged wiring or connections between the ECM and HVAC control module.
2. If the HVAC control module is faulty, replace it with a new one.
3. Update the software in the HVAC control module if necessary.

How to erase DTC U0466 on BMW

To erase DTC U0466 on a BMW, you can:

1. Use a diagnostic scanner to clear the fault codes stored in the ECM.
2. After fixing the underlying issue, perform a drive cycle to ensure the fault code does not return.

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.