Valves cannot be activated in cylinder 5, causing fuel injection/ignition to be disabled for that cylinder
Valves cannot be switched off (deactivated) in cylinder 5
Engine smooth running affected due to valves not remaining open or closed as specified by ECM
What to check (live data)
Engine speed sender G28 signal (used by ECM to detect vibrations/imbalance from cylinder contribution fault)
Intake manifold pressure (monitored continuously for irregularities)
Valve lift changeover feedback/return signal from ECM
Parts often involved in P0275
ZAS (cylinder deactivation) valve/actuator for cylinder 5
Cam element for cylinder 5
Engine Speed Sender G28
Don't replace parts until the root cause is confirmed — many of these codes are caused by wiring, a connector or an upstream fault, not the part itself.
Get the confirmed root cause for P0275 — on YOUR vehicle
A code is a symptom, not a diagnosis. AutoDX Pro cross-checks several
independent assessments, pinpoints the actual root cause, gives you the
exact tests to confirm it, and shows the parts — only after the cause is
confirmed. Reads your scan-tool photo and decodes your VIN with open
recalls.
P0275 is a diagnostic trouble code: Cylinder 5 Contribution/Balance.
What are the common causes of P0275?
Common causes include: Valve lift changeover malfunction in cylinder 5 (ZAS valve stroke changeover fault), Valves cannot be activated in cylinder 5, causing fuel injection/ignition to be disabled for that cylinder, Valves cannot be switched off (deactivated) in cylinder 5, Engine smooth running affected due to valves not remaining open or closed as specified by ECM. The exact cause depends on the vehicle — confirm it before replacing parts.
Can I keep driving with P0275?
It depends on the fault and your symptoms. Some causes are minor, others can damage components or affect safety. Get the root cause confirmed before deciding.
How do I fix P0275?
Confirm the actual root cause with targeted tests first, then replace only the part that's at fault. AutoDX Pro gives you the root cause, the exact tests, and the parts for P0275 on your specific vehicle.