What are the common causes of P0084?

A failed exhaust valve control solenoid on Bank 2. An open or short in the Bank 2 exhaust valve control solenoid wiring. Corrosion or damage at the Bank 2 solenoid connector. Low engine oil level or pressure affecting the actuator. A fault in the ECM solenoid driver.

Check engine oil level and condition. Test the Bank 2 exhaust valve control solenoid wiring for opens and shorts. Measure exhaust valve control solenoid resistance. Inspect the Bank 2 solenoid connector for corrosion. Replace the Bank 2 exhaust valve control solenoid if it is faulty. Clear the code and retest.

P0084

Exhaust Valve Control Solenoid Circuit Bank 2

System: Fuel and air metering (P code)
Lamp: Check Engine Light
Category: Powertrain - Fuel/Air Metering

What it means

P0084 means Exhaust Valve Control Solenoid Circuit Bank 2.

Where it lives

For P0084, the circuit described runs through the solenoid. The description of P0084 puts it on bank 2.

Check these first

A failed exhaust valve control solenoid on Bank 2
An open or short in the Bank 2 exhaust valve control solenoid wiring
Corrosion or damage at the Bank 2 solenoid connector
Low engine oil level or pressure affecting the actuator
A fault in the ECM solenoid driver

What to do next

Check engine oil level and condition
Test the Bank 2 exhaust valve control solenoid wiring for opens and shorts
Measure exhaust valve control solenoid resistance
Inspect the Bank 2 solenoid connector for corrosion
Replace the Bank 2 exhaust valve control solenoid if it is faulty
Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.