What P0174 Means on Your 2024 GMC Canyon
A P0174 code on your 2024 GMC Canyon indicates the ECM has detected a lean air-fuel condition on Bank 2. The redesigned 2024 Canyon is powered by a 2.7L turbocharged four-cylinder engine producing 310 horsepower and 390 lb-ft of torque. As an inline-four, it has one cylinder bank, and P0174 indicates the lean correction range has been exceeded.
The new Canyon's turbo engine is a significant upgrade in power and capability. A lean condition should be addressed promptly to protect this advanced powertrain.
Symptoms
- Check engine light on
- Rough or unsteady idle
- Reduced boost and power
- Poor fuel economy
- Hesitation on acceleration
- Possible surging at cruise speed
Common Causes
- Boost Leak (35% likelihood) – The 2.7T has turbo charge piping, intercooler connections, and couplers that can have factory assembly issues or develop leaks.
- MAF Sensor Issue (25% likelihood) – Early contamination or factory defect in the mass airflow sensor.
- Fuel System Problem (20% likelihood) – Direct injection injector or fuel pressure issue.
- Software Calibration (20% likelihood) – The redesigned Canyon may have ECU updates for fuel trim optimization.
Diagnosis
- Dealer visit – The 2024 Canyon is under full warranty.
- Check TSBs – As a new platform, GM may have issued service bulletins.
- Boost leak test – Pressurize the intake to locate leaks.
- Component testing – MAF, injectors, fuel pressure.
Repair Costs
- All repairs should be covered under warranty.
- Out-of-pocket estimates: Boost leak $80–$400, MAF $80–$250, fuel system $250–$600, software $0–$150.
Take It to the Dealer
The 2024 Canyon is under GM's 3-year/36,000-mile bumper-to-bumper warranty and 5-year/60,000-mile powertrain warranty. The dealer will diagnose and repair at no cost using GM's proprietary tools.
Prevention
- Follow GM's maintenance schedule
- Use quality fuel
- Report any drivability changes to the dealer
- Keep OEM components in place
- Stay current on software updates