The control module judged the Cylinder 10 Exhaust Valve Control behaviour implausible for the current operating conditions.
TuningBot DTC Database · v4.37.15
P3478 Cylinder 10 Exhaust Valve Control Circuit Performance
Generic (OBD-II) interpretation in the TuningBot DTC database.
What P3478 means
Related and nearby codes
How to read P3478
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 P3478
What does P3478 mean?
Cylinder 10 Exhaust Valve Control Circuit Performance. The control module judged the Cylinder 10 Exhaust Valve Control behaviour implausible for the current operating conditions.
Is P3478 generic or manufacturer-specific?
P3478 is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.
Can TuningBot remove P3478 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
