Powertrain
Definition only
Lights the check engine lamp
P289A: Cylinder 3 Ion Current Sense Circuit Low
Standardized SAE J2012 code · P28xx codes
What does P289A mean?
Ion current from cylinder 3 is below the expected window. Spark plug fouled, signal wire shorted to ground, or sensing path interrupted.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Common causes
- High Spark plug fouled with carbon or oil
- Medium Sense wire shorted to ground
- Low Connector pins corroded - high contact resistance
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of P289A on the same make and model first.
P289A in the community
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Describe your P289A problemRelated codes
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- P2896 Cylinder 2 Ion Current Sense Circuit Low
- P289E Cylinder 4 Ion Current Sense Circuit Low
- P28A2 Cylinder 5 Ion Current Sense Circuit Low
- P28A6 Cylinder 6 Ion Current Sense Circuit Low
- P28AA Cylinder 7 Ion Current Sense Circuit Low
- P28AE Cylinder 8 Ion Current Sense Circuit Low
- P28B2 Cylinder 9 Ion Current Sense Circuit Low
- P28B6 Cylinder 10 Ion Current Sense Circuit Low
- P28BA Cylinder 11 Ion Current Sense Circuit Low
- P28BE Cylinder 12 Ion Current Sense Circuit Low