P28A3
Cylinder 5 Ion Current Sense Circuit High
P28A3 is an OBD-II diagnostic trouble code meaning: Cylinder 5 Ion Current Sense Circuit High. Common causes: malfunction of the ion current sensor of the 5th cylinder, open or short circuit in the sensor circuit. Estimated repair cost: $28–89.
Symptoms
- Check Engine light comes on
- Reduced engine power
- Increased fuel consumption
- Unstable engine idling
- Possible misfire in cylinder 5
Causes
- Malfunction of the ion current sensor of the 5th cylinder
- Open or short circuit in the sensor circuit
- Poor contact in the sensor connector
- Wiring harness damage
- Engine control module malfunction
How to Fix
- Check the integrity of the ion current sensor circuit
- Inspect the connectors and contacts of the sensor
- Check the resistance of the ion current sensor
- Replace ion current sensor if necessary
- Check and, if necessary, replace the engine control module
Related codes
Error P28A3 by Vehicle Brand
FAQ
What does the P28A3 code mean?
P28A3 is an OBD-II diagnostic trouble code that indicates: Cylinder 5 Ion Current Sense Circuit High
What causes a P28A3 error code?
The most common causes of P28A3 include: Malfunction of the ion current sensor of the 5th cylinder; Open or short circuit in the sensor circuit; Poor contact in the sensor connector; Wiring harness damage.
How do I fix a P28A3 diagnostic trouble code?
To fix P28A3: Check the integrity of the ion current sensor circuit. Inspect the connectors and contacts of the sensor. Check the resistance of the ion current sensor. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P28A3?
Yes, but get it checked soon
How much does it cost to fix P28A3?
The estimated repair cost for P28A3 is $28–89. Actual cost depends on your vehicle, location, and labor rates.
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