OBD-II code · Powertrain (manufacturer / generic)
P3488 Cylinder 11 Exhaust Valve Control Circuit High
Cylinder 11 exhaust valve control voltage above expected range — short to power or open ground. The exhaust control valve modulates exhaust backpressure or routing (EGR feed, sound, regen support); a malfunction shifts torque mapping and may trigger limp mode.
Is it safe to drive with P3488?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyWiring shorted to battery
- Less likelyConnector pins corroded - high contact resistance
- Less likelySupply wire pinched against B+ source
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–3 h
- Emissions test
- Likely to fail
- Parts involved
- Cyl11 Exhaust Valve Actuator, Actuator Wiring
Related codes
- P3416Cylinder 2 Exhaust Valve Control Circuit High
- P3424Cylinder 3 Exhaust Valve Control Circuit High
- P3432Cylinder 4 Exhaust Valve Control Circuit High
- P3439Cylinder 5 Exhaust Valve Control Circuit High
- P3447Cylinder 6 Exhaust Valve Control Circuit High
- P3463Cylinder 8 Exhaust Valve Control Circuit High
- P3464Cylinder 8 Exhaust Valve Control Circuit High
- P3485Cylinder Deactivation Solenoid Bank 2 Control Circuit High
- P3486Cylinder 11 Exhaust Valve Control Circuit Performance
- P3487Cylinder 11 Exhaust Valve Control Circuit Low
- P3489Cylinder 11 Deactivation
- P3490Cylinder Deactivation System Performance Bank 1
- P3491Cylinder Deactivation System Performance Bank 2
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.