OBD-II code · Powertrain (manufacturer / generic)
P3477 Cylinder Deactivation Oil Pressure Switch Bank 2 Circuit
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 with P3477?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- Most likelyOil pressure switch failed
- PossibleWiring short or open
- Less likelyConnector corrosion
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–4 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Oil Pressure Switch, Engine Wiring Harness, Ecm
Related codes
- P3475Cylinder Deactivation Oil Pressure Switch Bank 1 Circuit
- P3474Cylinder Deactivation Hydraulic Circuit Bank 2 High
- P3476Cylinder Deactivation Oil Pressure Switch Bank 1 Performance
- P3478Cylinder Deactivation Oil Pressure Switch Bank 2 Performance
- P3479Cylinder Deactivation Solenoid Bank 1 Control Circuit Open
- P3480Cylinder Deactivation Solenoid Bank 2 Control Circuit Open
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.