What Does P0171 Mean on a 2022 Chevrolet Traverse?
If your 2022 Chevrolet Traverse has set a P0171 code, the engine control module has detected a lean air-fuel mixture on Bank 1. The 2022 Traverse uses the same 3.6L V6 engine (LFY) producing 310 horsepower. On this transverse-mounted V6, Bank 1 is the rear cylinder bank near the firewall. The code means the air-to-fuel ratio has drifted too far lean on those cylinders.
The 2022 Traverse sits in the sweet spot of being newer enough to potentially have warranty coverage while also being old enough for some wear-related issues to start appearing. Let's figure out what's going on.
Symptoms You Might Notice
- Check engine light on
- Rough idle that may improve as the engine warms up
- Hesitation or stumble during acceleration
- Reduced fuel economy
- Possible engine surging at steady speeds
- Misfires may accompany the lean condition
Common Causes of P0171 on the 2022 Chevrolet Traverse
- Intake Manifold Gasket Leak (30% likelihood) - Intake gaskets on the 3.6L can develop vacuum leaks that allow unmetered air into specific cylinder banks.
- Dirty MAF Sensor (25% likelihood) - Contamination from oil or dust on the mass airflow sensor leads to underreported airflow and a lean fuel calculation.
- Direct Injection Carbon Buildup (25% likelihood) - The 3.6L DI engine is susceptible to carbon deposits on intake valves and injector tips that restrict fuel flow.
- PCV Valve or Hose Failure (20% likelihood) - A leaking PCV system introduces unmetered air past the MAF sensor.
How to Diagnose the Problem
- Pull all codes - Check for Bank 2 lean (P0174) and misfire codes. Both banks lean means a systemic issue; one bank lean means a localized problem.
- Check fuel trims - LTFT above +10% on Bank 1 confirms the lean condition. Compare against Bank 2 trims.
- Smoke test - Inject smoke into the intake to locate gasket leaks, cracked hoses, or loose connections.
- MAF sensor test - Compare live data readings to GM specifications for the 3.6L V6.
- Fuel pressure monitoring - Check high-pressure fuel rail readings at idle and under load against factory specs.
Repair Options and Cost Breakdown
- Intake manifold gasket replacement - $300 to $600. Standard repair with readily available parts.
- MAF sensor cleaning/replacement - $50 to $300. Always try cleaning first.
- Carbon cleaning service - $250 to $600. Walnut blasting or chemical cleaning of intake valves and injectors.
- PCV system repair - $80 to $250. Affordable parts and moderate labor.
Can You DIY This Repair?
MAF sensor cleaning is a simple 10-minute DIY task. PCV hose inspection is straightforward. Intake manifold gasket work on the transverse V6 is more involved due to space constraints. Carbon cleaning requires professional equipment and expertise.
Prevention Tips
- Replace the air filter every 15,000-20,000 miles
- Use Top Tier gasoline consistently to reduce carbon buildup
- Check PCV hoses for cracks during routine maintenance
- Consider fuel system cleaning every 40,000 miles
- Stay current with GM's recommended maintenance schedule