Code result
U3023
Control Module Input Power Circuit A - Ignition Input On/Start Circuit Correlation
Moderate severity
What it means
Control Module Input Power Circuit A - Ignition Input On/Start Circuit Correlation: the value does not correlate with the related sensor or expected pattern.
Is it safe to drive?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Wiring or relay fault between supply and ignition path
highOne of the most commonly reported causes for this code — check this first.
Gateway module routing CAN messages incorrectly
lowLess common, but worth ruling out after the more likely causes.
CAN terminating resistor (120 Ω) drifted out of spec
lowLess common, but worth ruling out after the more likely causes.
Related help
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