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P289C
Cylinder 4 Ion Current Sense Circuit
Generic · engine
Data confidence
65%
The control module detected improper operation of the Cylinder 4 Ion Current Sense circuit.
TuningBot DTC Database · v4.37.15
P289C Cylinder 4 Ion Current Sense Circuit
Generic (OBD-II) interpretation in the TuningBot DTC database.
What P289C means
Related and nearby codes
How to read P289C
P
Powertrain: engine, transmission and driveline systems.
2
Generic SAE-standard code: same meaning on every make.
89C
Specific fault index within the subsystem.
Frequently asked questions about P289C
What does P289C mean?
Cylinder 4 Ion Current Sense Circuit. The control module detected improper operation of the Cylinder 4 Ion Current Sense circuit.
Is P289C generic or manufacturer-specific?
P289C is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.
Can TuningBot remove P289C at file level?
If the fault logic lives in the ECU calibration, yes: our DTC Removal file service disables the specific fault entry. Checksum correction is not included: it is a separate, optional service. Not sure whether your case qualifies? Request a free assessment and our engineers will check your ECU file.
Other file services
Understand the system behind this code: Diagnostic Strategy and DTC Logic