P2891
Cylinder 1 Ion Current Sense Circuit Range/Performance
P2891 is an OBD-II diagnostic trouble code meaning: Cylinder 1 Ion Current Sense Circuit Range/Performance. Common causes: open or short circuit in the ion current circuit, cylinder 1 spark plug fault. Estimated repair cost: $17–89.
Symptoms
- Unstable engine idling
- Reduced engine power
- Increased fuel consumption
- Check Engine Light Illuminates
- Possible misfire in cylinder 1
Causes
- Open or short circuit in the ion current circuit
- Cylinder 1 spark plug fault
- Problems with the ignition coil
- Sensor contacts are dirty or damaged
- Engine control unit malfunction
How to Fix
- Check the condition of the spark plug in cylinder 1
- Check the integrity of the wires of the ion current circuit
- Diagnose the ignition coil
- Clean sensor contacts and check connections
- If necessary, replace the ion current sensor
Related codes
Error P2891 by Vehicle Brand
FAQ
What does the P2891 code mean?
P2891 is an OBD-II diagnostic trouble code that indicates: Cylinder 1 Ion Current Sense Circuit Range/Performance
What causes a P2891 error code?
The most common causes of P2891 include: Open or short circuit in the ion current circuit; Cylinder 1 spark plug fault; Problems with the ignition coil; Sensor contacts are dirty or damaged.
How do I fix a P2891 diagnostic trouble code?
To fix P2891: Check the condition of the spark plug in cylinder 1. Check the integrity of the wires of the ion current circuit. Diagnose the ignition coil. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P2891?
Yes, but get it checked soon
How much does it cost to fix P2891?
The estimated repair cost for P2891 is $17–89. Actual cost depends on your vehicle, location, and labor rates.
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