P289C
Cylinder 4 Ion Current Sense Circuit
P289C is an OBD-II diagnostic trouble code meaning: Cylinder 4 Ion Current Sense Circuit. Common causes: open or short circuit in the ion current circuit, malfunction of the spark plug of the 4th cylinder. Estimated repair cost: $6–33.
Symptoms
- Unstable engine operation
- Misfire in cylinder 4
- Increased fuel consumption
- Reduced engine power
- Check Engine Light Illuminates
Causes
- Open or short circuit in the ion current circuit
- Malfunction of the spark plug of the 4th cylinder
- Wiring harness damage
- Engine control unit malfunction
- Poor contact in connectors
How to Fix
- Check the condition of the spark plug in the 4th cylinder
- Check the integrity of the ion current circuit
- Inspect connectors and wiring harness for damage
- Check the resistance of the ion current circuit
- If necessary, replace the spark plug or repair the wiring
Related codes
Error P289C by Vehicle Brand
FAQ
What does the P289C code mean?
P289C is an OBD-II diagnostic trouble code that indicates: Cylinder 4 Ion Current Sense Circuit
What causes a P289C error code?
The most common causes of P289C include: Open or short circuit in the ion current circuit; Malfunction of the spark plug of the 4th cylinder; Wiring harness damage; Engine control unit malfunction.
How do I fix a P289C diagnostic trouble code?
To fix P289C: Check the condition of the spark plug in the 4th cylinder. Check the integrity of the ion current circuit. Inspect connectors and wiring harness for damage. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P289C?
Yes, but get it checked soon
How much does it cost to fix P289C?
The estimated repair cost for P289C is $6–33. Actual cost depends on your vehicle, location, and labor rates.
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