P3435 indicates that the control circuit for the cylinder 5 intake valve deactivation solenoid is reading a voltage lower than expected. This circuit drives the solenoid that disables the intake valve during cylinder deactivation, and a low signal typically points to an open or shorted wiring path or a failed solenoid.
The solenoid internal coil may be open, causing the control circuit to read low voltage.
A broken wire, damaged insulation, or corroded splice can prevent the PCM from driving the solenoid properly.
Poor contact adds resistance, resulting in a low voltage reading on the control line.
Insufficient oil pressure can prevent the solenoid from actuating, though the code is primarily electrical.
The PCM output driver for this solenoid may be damaged, but this is uncommon and should be considered only after wiring and solenoid are verified.
Rarely. The majority of cases are caused by a failed solenoid, open wiring, or a bad connector. PCM failure should be considered only after those items are ruled out.
Low oil pressure can prevent the solenoid from mechanically actuating, but the code itself is an electrical low‑voltage detection. Oil pressure issues usually set separate codes.
The vehicle will likely run with reduced power and the cylinder deactivation system disabled. Extended driving may increase wear on cylinder 5 components, so repair is recommended.
Only after confirming the wiring and connector are intact and the solenoid resistance is out of specification. Replacing the solenoid without testing can lead to unnecessary parts replacement.