U0901

Invalid Data from 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
Unstable engine operation at idle
Increased fuel consumption
Possible misfires

Causes

Ion sensing module malfunction
Damage to the wiring harness to the module
Poor contact in module connectors
Module grounding problems
Errors in ECU software

How to Fix

Check the integrity of the wiring harness to the module
Check the quality of connections and contacts in the connectors
Check module grounding
Scan the system for other errors
If necessary, replace the ion sensing module

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