U0406

Invalid Data Received From Fuel Injector Control Module

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine light comes on
Increased fuel consumption
Loss of engine power
Rough idle
Problems starting the engine

Causes

Malfunction of the fuel injector control module
Damage to the wiring harness between modules
Poor contact in connectors
Problems with power supply to the injector control module
Software error in the ECU

How to Fix

Check the integrity of the wiring harness between the modules
Inspect and clean the contacts in the connectors
Check power and ground of injector control module
Scan the injector control module for errors
If necessary, replace the injector control module

Related codes

U0401 U0402 U0405