U0673

Lost Communication With Ion Sense Module

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine light comes on
Reduced engine power
Increased fuel consumption
Unstable engine operation at idle
Problems starting the engine

Causes

Open or short circuit in the ion sensing module circuit
Ion sensing module malfunction
Problems with the wiring harness or connectors
Engine ECU malfunction
Module power problems

How to Fix

Check the integrity of the wiring harness and connectors
Check the supply voltage of the ion sensing module
Scan the module for additional errors
Replace ion sensing module if necessary
Check and, if necessary, replace the engine ECU

Related codes

U0671 U0672 U0674