MasterTuning Fault code dictionary (DTC)

P1278 — Cylinder #8 High To Low Side Open

Severity: Warning Can you drive? With caution: limp mode possible, have it checked soon Make: All makes (OBD-II standard)
MeaningCylinder #8 High To Low Side Open.
FamilyPowertrain (P)

Frequently asked questions

What does code P1278 mean?

Cylinder #8 High To Low Side Open. Cylinder #8 High To Low Side Open.

Can I keep driving with code P1278 active?

With caution: limp mode possible, have it checked soon

How do you fix code P1278?

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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Where to get it fixed

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