P3477
Cylinder Deactivation Oil Pressure Switch Bank 2 Circuit
What it means
The engine control module has detected an electrical fault in the cylinder deactivation oil pressure switch circuit on bank 2. Without a valid signal the module cannot confirm that hydraulic pressure has reached the level needed to deactivate cylinders on bank 2.
Is it safe to drive?
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Oil pressure switch failed
highOne of the most commonly reported causes for this code — check this first.
Wiring short or open
mediumA plausible cause — test and verify before replacing parts.
Connector corrosion
lowLess common, but worth ruling out after the more likely causes.
Related help
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