P28A1
Cylinder 5 Ion Current Sense Circuit Range/Performance
P28A1 is an OBD-II diagnostic trouble code meaning: Cylinder 5 Ion Current Sense Circuit Range/Performance. Common causes: open or short circuit in the ion current circuit, spark plug fault. Estimated repair cost: $6–33.
Symptoms
- Unstable engine operation
- Increased fuel consumption
- Power Loss
- Check Engine Light Illuminates
Causes
- Open or short circuit in the ion current circuit
- Spark plug fault
- Problems with the engine control unit
- Wiring harness damage
How to Fix
- Check the integrity of the ion current circuit
- Replace spark plug
- Check the operation of the engine control unit
- Inspect the wiring harness for damage
Related codes
Error P28A1 by Vehicle Brand
FAQ
What does the P28A1 code mean?
P28A1 is an OBD-II diagnostic trouble code that indicates: Cylinder 5 Ion Current Sense Circuit Range/Performance
What causes a P28A1 error code?
The most common causes of P28A1 include: Open or short circuit in the ion current circuit; Spark plug fault; Problems with the engine control unit; Wiring harness damage.
How do I fix a P28A1 diagnostic trouble code?
To fix P28A1: Check the integrity of the ion current circuit. Replace spark plug. Check the operation of the engine control unit. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P28A1?
Yes, but get it checked soon
How much does it cost to fix P28A1?
The estimated repair cost for P28A1 is $6–33. Actual cost depends on your vehicle, location, and labor rates.
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