Detailed Description of Error P0084

Error code P0084 stands for ''Exhaust Valve Control Solenoid Circuit Bank 2''. This code is triggered when the powertrain control module (PCM) detects an issue with the exhaust valve control solenoid circuit in bank 2 of the engine. The exhaust valve control solenoid is responsible for regulating the flow of exhaust gases in the engine. It receives signals from the PCM to open or close, allowing the exhaust gases to flow into the catalytic converter or be bypassed. When the PCM detects an abnormal voltage reading or signal from the exhaust valve control solenoid circuit, it will trigger the P0084 code and illuminate the check engine light.

Possible Causes of Error P0084

• Short or open circuit in the exhaust valve control solenoid wiring
• Corrosion or damage to the exhaust valve control solenoid connector
• Failed or faulty exhaust valve control solenoid
• PCM or engine control module (ECM) issue
• Wiring harness or connector damage
• Low battery voltage or poor electrical connections
• Bad or faulty throttle position sensor (TPS)
• Bad or faulty manifold absolute pressure (MAP) sensor

Possible Fixes for Error P0084

1. Check the exhaust valve control solenoid wiring for any signs of damage or corrosion and repair or replace as needed.
2. Use a multimeter to test the voltage reading of the exhaust valve control solenoid circuit to determine if the issue is with the solenoid or the wiring.
3. Replace the exhaust valve control solenoid if it is found to be faulty.
4. Check the PCM or ECM for any software updates or issues.
5. Repair or replace the wiring harness or connector if damage is found.
6. Check the battery voltage and electrical connections to ensure they are within specifications.
7. Replace the throttle position sensor (TPS) or manifold absolute pressure (MAP) sensor if they are found to be faulty.