U04B3

Invalid Data Received From 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
Switching to emergency mode of operation of the box
Check Engine Light Illuminates
Loss of power or jerking when shifting
Maximum speed limit

Causes

Planetary control module malfunction
Damage to the wiring harness to the module
Poor contact in connectors
Software error in the module
Module power problems

How to Fix

Check connections and condition of module connectors
Test the integrity of the wires to the module
Check the power supply and ground of the module
Flash or replace the control module
Carry out diagnostics of the mechanics of the planetary gearbox

Related codes

U04B1 U04B2 U04B4