Powertrain
Definition only
Lights the check engine lamp
P289E: Cylinder 4 Ion Current Sense Circuit Low
Standardized SAE J2012 code · P28xx codes
What does P289E mean?
Ion current from cylinder 4 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 P289E on the same make and model first.
P289E in the community
Ask about P289ENo one has posted about P289E yet
Share your vehicle, the tool you used and what you tested — the first thread helps everyone who searches for this code.
Describe your P289E problemRelated codes
- P2892 Cylinder 1 Ion Current Sense Circuit Low
- P2896 Cylinder 2 Ion Current Sense Circuit Low
- P289A Cylinder 3 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