What P0174 Means on Your 2024 GMC Acadia
A P0174 code on your 2024 GMC Acadia indicates the engine control module has detected a lean air-fuel condition on Bank 2. The redesigned 2024 Acadia features a 2.5L turbocharged four-cylinder engine (328 hp) as its sole powertrain option. As an inline-four, it has one cylinder bank, and P0174 flags when the lean correction range is exceeded.
The 2024 Acadia represents a complete redesign with a new turbocharged engine. This is a vehicle that should be handled by the dealer while under warranty.
Symptoms
- Check engine light on
- Rough or unstable idle
- Reduced power and boost response
- Decreased fuel economy
- Engine hesitation
- Possible surging at cruise speeds
Common Causes
- Boost Leak (35% likelihood) – The new 2.5T engine has turbo plumbing connections that can have factory assembly issues or component defects.
- MAF Sensor Issue (25% likelihood) – A factory defect or early contamination in the mass airflow sensor.
- Fuel System Problem (20% likelihood) – Faulty injector or fuel pressure issue in the direct injection system.
- Software Calibration (20% likelihood) – As a brand-new platform, GM may have calibration updates for fuel trim behavior.
Diagnosis
- Dealer visit – This is a new platform under warranty. The dealer has the proper tools and access to TSBs.
- Check for recalls and TSBs – First-year models often have software updates.
- Monitor fuel trims – Confirm the lean condition with LTFT data.
- Boost leak test – Pressurize the intake system to find leaks.
- Fuel pressure verification – Test against GM specifications.
Repair Costs
- Boost leak repair – $80–$400.
- MAF sensor – $100–$280.
- Fuel system repair – $250–$700.
- Software update – Free under warranty.
The 2024 Acadia is covered by GM's 3-year/36,000-mile bumper-to-bumper warranty and 5-year/60,000-mile powertrain warranty. Let the dealer handle this.
Dealer Is Your Best Option
With a completely new engine platform and full warranty coverage, the dealer is absolutely the right choice. They can diagnose with GM's proprietary tools, apply software updates, and use genuine GM parts, all at no cost to you.
Prevention
- Follow GM's recommended maintenance schedule
- Use quality fuel
- Keep OEM components in place
- Report any drivability issues to the dealer promptly
- Keep up with software updates at service visits