B389A

Environment Identification

Severity

⚠️ Medium

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$56–167 (est.)

Symptoms

Incorrect operation of climate control
Security bugs
Reduced effectiveness of adaptive suspension
Check Engine Light Illuminates

Causes

Environmental sensor malfunction
Damage to the wiring harness to the sensor
Problems with the control unit software
Short circuit in the sensor circuit

How to Fix

Diagnose the environmental sensor using an OBD-II scanner
Checking the integrity of the wiring harness and connections
Replacing a faulty sensor if necessary
Control unit software update

Related codes

B389B B389C U0121