Exhaust Valve Control Solenoid Circuit Bank 2
What it means
P0084 means the computer has detected a circuit fault in the Bank 2 exhaust valve control solenoid. This solenoid is part of the variable valve timing system and uses oil pressure to adjust exhaust cam timing. When its circuit is open, shorted, or high-resistance, the ECM can't control timing on that bank, which can cause rough idle and reduced power. Clean oil at the correct level is important for the VVT system to operate.
Can I keep driving? Usually still drivable, but Bank 2 valve timing may be off — expect rough idle or reduced power; fix it before it affects economy and emissions.
Common symptoms
What you'll notice
- Check-engine light on
- Rough idle
- Reduced power or sluggish acceleration
- Slightly poorer fuel economy
Common causes
Most likely first
- Faulty exhaust valve control (VVT oil-control) solenoid on Bank 2Likely
- Open, short, or high resistance in the solenoid control circuitCommon
- Loose or corroded connector at the solenoidCommon
- Low or contaminated engine oil affecting VVT operationLess often
- Failed ECM (rare)Less often
How to diagnose & fix
Work through it in order
- Confirm the code and check engine oil level and condition.
- Inspect the Bank 2 solenoid connector and wiring for damage or corrosion.
- Measure the solenoid resistance against spec.
- Replace the exhaust valve control solenoid if it's out of spec.
- Repair wiring, clear the code, and retest.
FAQ
Quick answers
Is it safe to drive with P0084?+
Can I just clear P0084?+
Related codes
Often seen with P0084
Read & clear P0084 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.