OBD-II Fault Code

U2005: Audio Rear Integrated Control Panel Unit is Not Responding

Meaning, symptoms, likely causes, diagnostic checks and repair guidance for U2005.

System family

Network

Generic/SAE

Repair category

EGR / emissions

Use this category to narrow your checks before replacing parts.

Severity

Medium

Severity is a general guide. Confirm with scan-tool data and vehicle symptoms.

What U2005 usually means

Audio Rear Integrated Control Panel Unit is Not Responding.

Common symptoms

Multiple warning lights or modules not communicating

Likely causes

Stuck EGR valve; Blocked EGR passage; Vacuum/control solenoid fault; DPFE/position sensor fault

Diagnostic checks

Check battery condition, module fuses, grounds and network connectors before replacing modules; Command EGR operation if supported; Inspect passages for carbon blockage

Repair guidance

Clean carbon passages, repair vacuum/control circuit, replace stuck valve or failed sensor after testing

Verification after repair

Rescan all modules and confirm communication returns

Note: Confirm vehicle make/model/year because manufacturer-specific codes can vary. A DTC identifies a circuit or system condition, not always the failed part.