What P0174 Means on Your 2024 Chevrolet Silverado
A P0174 code on your 2024 Chevy Silverado indicates that Bank 2 of the engine is running too lean. The 2024 Silverado offers multiple engine options: a 2.7L turbocharged 4-cylinder, a 5.3L V8, and a 6.2L V8. On the V8 engines, Bank 2 is the driver-side cylinder bank. On the 2.7L turbo, Bank 2 refers to the secondary O2 sensor circuit. A lean condition means too much air or too little fuel is entering the combustion chambers.
Common Symptoms
- Check engine light on
- Rough or unstable idle
- Hesitation during acceleration
- Reduced towing power
- Lower fuel economy
- Possible engine surging at highway speeds
Top Causes for the 2024 Silverado
- Intake Manifold or Vacuum Leak (30% likelihood) - The 5.3L and 6.2L V8s use composite intake manifolds that can develop gasket leaks. The 2.7L turbo has pressurized intake plumbing that can develop boost leaks.
- MAF Sensor Issue (25% likelihood) - Even on a new truck, contamination or a defective sensor can cause lean codes.
- Fuel Injector Problem (25% likelihood) - The direct injection systems on all three engines can have individual injector flow issues from the factory.
- Software or Calibration Issue (20% likelihood) - GM may have PCM calibration updates available for the 2024 model year that address fuel trim issues.
Diagnosis Steps
- Check for TSBs - Look up GM technical service bulletins for the 2024 Silverado related to P0174 or fuel trim codes.
- Read all codes - Check for P0171 and misfire codes. Both banks lean points to MAF or fuel system issues.
- Smoke test - Introduce smoke into the intake to find vacuum or boost leaks.
- Test MAF sensor - Monitor readings and compare to GM specifications for your engine.
- Monitor fuel trims - Review short-term and long-term fuel trim data on both banks.
Repair Cost Estimates
- All repairs should be warranty-covered on a 2024 model.
- Out-of-pocket estimates: Vacuum leak $80-$350, MAF sensor $130-$350, Fuel injector $300-$800, Software update $0.
Warranty Coverage
Your 2024 Silverado is covered under GM's 3-year/36,000-mile bumper-to-bumper warranty and 5-year/60,000-mile powertrain warranty. Take it to a Chevrolet dealer for free diagnosis and repair.
Prevention Tips
- Follow GM's maintenance schedule
- Use OEM air filters and parts
- Use Top Tier fuel for clean injectors
- Report any drivability issues to your dealer promptly
- Avoid aftermarket modifications that could affect warranty coverage