U01B2

Lost Communication With Planetary Gear Set Control Module

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$56–278 (est.)

Symptoms

Incorrect gear shifting
Transmission of the gearbox into emergency mode
The Check Engine light comes on
Reduced vehicle dynamics
Possible jerking when changing gears

Causes

Broken or damaged wires in the communication circuit
Poor contact in module connectors
Planetary control module malfunction
Module power problems
CAN bus fault

How to Fix

Check the integrity of the wiring harness to the module
Inspect and clean the contacts in the connectors
Check the module supply voltage
Scan the CAN bus for errors
If necessary, replace the control module

Related codes

U0100 U0121 U0140