P28A9
Cylinder 7 Ion Current Sense Circuit Range/Performance
P28A9 is an OBD-II diagnostic trouble code meaning: Cylinder 7 Ion Current Sense Circuit Range/Performance. Common causes: open or short circuit in the wiring to the ion current sensor, damaged ion current sensor connector. Estimated repair cost: $17–89.
Symptoms
- Rough engine idling
- Loss of engine power
- Increased fuel consumption
- Malfunction indicator light comes on
- Misfire in cylinder 7
Causes
- Open or short circuit in the wiring to the ion current sensor
- Damaged ion current sensor connector
- Faulty ion current sensor of cylinder 7
- Problems with the engine control unit
- Poor ground connection
How to Fix
- Visual inspection of ion current circuit wiring and connectors
- Checking the resistance and continuity of the sensor circuit
- Testing the ion current sensor of cylinder 7
- Checking engine ground connections
- Engine control unit diagnostics
Related codes
Error P28A9 by Vehicle Brand
FAQ
What does the P28A9 code mean?
P28A9 is an OBD-II diagnostic trouble code that indicates: Cylinder 7 Ion Current Sense Circuit Range/Performance
What causes a P28A9 error code?
The most common causes of P28A9 include: Open or short circuit in the wiring to the ion current sensor; Damaged ion current sensor connector; Faulty ion current sensor of cylinder 7; Problems with the engine control unit.
How do I fix a P28A9 diagnostic trouble code?
To fix P28A9: Visual inspection of ion current circuit wiring and connectors. Checking the resistance and continuity of the sensor circuit. Testing the ion current sensor of cylinder 7. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P28A9?
Yes, but get it checked soon
How much does it cost to fix P28A9?
The estimated repair cost for P28A9 is $17–89. Actual cost depends on your vehicle, location, and labor rates.
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