The engine control module has detected a fault with the bank 2 cylinder deactivation pressure sensor. The analogue oil pressure sensor is used to verify the deactivation hydraulic state; a fault disables closed-loop deactivation control on bank 2.
Medium severity. Can I keep driving?Drive little and gently. If you hear timing chain noise or the oil light comes on, shut off the engine.
Bank 2 is the side without cylinder 1, so it only exists on V or boxer engines.
Most likely causes
- Pressure sensor failed
- Wiring or connector fault
- Sensor port contaminated by sludge
What to check, in order
Start with the simplest. You can tick off each step.
Good to know
- Repair difficulty: hard
- It affects emissions.
What each character of P3499 means
- P: Powertrain: engine and transmission
- 3: Generic or manufacturer code, depending on the range
- 4: Emissions
- 99: Specific fault in that system
Frequently asked questions
Can I keep driving with code P3499?
Drive little and gently. If you hear timing chain noise or the oil light comes on, shut off the engine.
What causes code P3499?
The most common causes are: pressure sensor failed; wiring or connector fault; sensor port contaminated by sludge.
Related codes
Sources
Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.