Code result
P28BE
Cylinder 12 Ion Current Sense Circuit Low
Moderate severity
What it means
Ion current from cylinder 12 is below the expected window. Spark plug fouled, signal wire shorted to ground, or sensing path interrupted.
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
Spark plug fouled with carbon or oil
highOne of the most commonly reported causes for this code — check this first.
Sense wire shorted to ground
mediumA plausible cause — test and verify before replacing parts.
Connector pins corroded - high contact resistance
lowLess common, but worth ruling out after the more likely causes.
Related help
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