P0084: Exhaust Valve Control Solenoid Circuit Bank 2
What Does P0084 Mean?
P0084 is a diagnostic trouble code indicating: Exhaust Valve Control Solenoid Circuit Bank 2. This code relates to the fuel and air metering system. It has been reported in NHTSA complaints across 1 different vehicle models.
Symptoms of P0084
- ⚠️ Airbag warning light on
Common Causes
- 🔍 Sensor or control module malfunction
Real Owner Reports
From NHTSA complaint database — actual owner descriptions.
"THE SERVICE AIRBAG LIGHT CAME ON AND OFF. TOOK IT TO DEALER TO HAVE TESTED. TROUBLE CODE P0084, DRIVER SEAT POSITION SENSOR. DIAGNOSTIC SHOWED FAULT IS IN AIRBAG SENSING AND DIAGNOSTIC MODULE, SHOWED FALSE HIGH RESISTANCE READING. SENSOR KIT AND MODULE NEEDED REPLACED, ALMOST $600 JUST FOR PARTS. TO"
— Gmc Sierra owner, 06/10/2014
Source: NHTSA Complaints Database
Most Reported Vehicles for P0084
Based on NHTSA owner complaint data.
| # | Vehicle | Reports |
|---|---|---|
| 1 | GMC SIERRA |
Frequently Asked Questions
Can I drive with this code?
Will this code cause my car to fail emissions?
How much does it typically cost to fix?
What To Do Next
Possible Fixes
- 🔧 Have the code scanned with a professional-grade scanner to read freeze frame data
- 🔧 Test the relevant sensor(s) with a multimeter before replacing
- 🔧 Clean or replace the mass air flow (MAF) sensor; check for vacuum leaks
- 🔧 If DIY repair isn't feasible, get a diagnostic from a trusted mechanic ($50-150)
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1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
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2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
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Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.