The control module judged the Cylinder 8 Ion Current Sense signal implausible: it stayed inside electrical limits but did not match the value expected for the current operating conditions.
TuningBot DTC Database · v4.37.15
P28AD Cylinder 8 Ion Current Sense Circuit Range/Performance
Generic (OBD-II) interpretation in the TuningBot DTC database.
What P28AD means
Related and nearby codes
How to read P28AD
Powertrain: engine, transmission and driveline systems.
Generic SAE-standard code: same meaning on every make.
Specific fault index within the subsystem.
Frequently asked questions about P28AD
What does P28AD mean?
Cylinder 8 Ion Current Sense Circuit Range/Performance. The control module judged the Cylinder 8 Ion Current Sense signal implausible: it stayed inside electrical limits but did not match the value expected for the current operating conditions.
Is P28AD generic or manufacturer-specific?
P28AD is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.
Can TuningBot remove P28AD 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
