U01B6

Lost Communication With Fuel Heater 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
Problems starting the engine in cold weather
Reduced engine performance
Unstable engine operation in the cold
Possible errors in related systems

Causes

Open or short circuit in the communication circuit
Malfunction of the fuel heating module
Module power problems
Poor contact in connectors
ECU malfunction

How to Fix

Check the integrity of the wiring harness to the module
Check the power supply and ground of the module
Inspect connectors for corrosion
Test the fuel heating module
Replace the module if necessary

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