MasterTuning Fault code dictionary (DTC)

P0078 — Exhaust Valve Control Solenoid Circuit (Bank 1)

Severity: Warning Can you drive? With caution: limp mode possible, have it checked soon Make: All makes (OBD-II standard)
MeaningExhaust Valve Control Solenoid Circuit (Bank 1).
FamilyPowertrain (P)

Frequently asked questions

What does code P0078 mean?

Exhaust Valve Control Solenoid Circuit (Bank 1). Exhaust Valve Control Solenoid Circuit (Bank 1).

Can I keep driving with code P0078 active?

With caution: limp mode possible, have it checked soon

How do you fix code P0078?

Diagnosis starts from reading the live ECU parameters: the code points to the fault area, not to the part to replace. A vehicle-electronics specialist can test the component and clear the code after the repair.

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