What Does P0172 Mean on Your 2024 Chevrolet Traverse?
A P0172 code on the 2024 Chevrolet Traverse means the engine control module has detected a rich fuel condition on Bank 1. The 2024 Traverse is completely redesigned and powered by a new 2.5L turbocharged four-cylinder engine producing 315 horsepower and 354 lb-ft of torque. As an inline-four, there is only one bank, so P0172 affects the entire engine.
This is a significant change from the previous generation's 3.6L V6. The turbocharged engine has its own unique set of potential causes for running rich, including boost system leaks that the old V6 did not have.
Common Symptoms You May Notice
- Check engine light on
- Reduced fuel economy
- Rough or unstable idle
- Black exhaust smoke
- Fuel smell at the tailpipe
- Reduced power under boost
Top Causes of P0172 on the 2024 Traverse
- Dirty MAF sensor - Even on a new vehicle, the MAF sensor can become contaminated. It underreports airflow, causing the ECM to inject excess fuel.
- Boost or charge pipe leak - The new 2.5L turbo has charge piping between the turbo, intercooler, and throttle body. Any leak causes air loss after the MAF measurement, resulting in over-fueling.
- Faulty upstream O2 sensor - A manufacturing defect in the oxygen sensor can cause incorrect fuel trim calculations on a brand-new vehicle.
- EVAP purge valve malfunction - A stuck-open purge valve sends excess fuel vapor into the intake.
How to Diagnose the Problem
Scan for codes and check freeze frame data. Review STFT and LTFT values. Negative LTFT past -10% confirms the rich condition.
Check the air filter (should be clean on a 2024) and clean the MAF sensor with proper cleaner. Inspect all turbo charge pipe connections for tightness or leaks. A smoke test is ideal.
Monitor the upstream O2 sensor with live data. It should oscillate between 0.1V and 0.9V.
Repair Options and Cost Estimates
- MAF sensor cleaning or replacement: Cleaning under $10. New sensor $50-$170 plus $45-$100 labor.
- Boost leak repair: Parts $20-$75. Labor $70-$180.
- O2 sensor replacement: Parts $50-$155. Labor $70-$140.
- EVAP purge valve: Parts $25-$55. Labor $50-$100.
Can You Fix This Yourself?
Since the 2024 Traverse is under factory warranty, take it to the dealer for any repairs. DIY work on a vehicle under warranty could void coverage for related components.
Prevention Tips
- Follow the factory maintenance schedule
- Use quality fuel from reputable stations
- Address check engine lights immediately to maintain warranty coverage
- Keep all maintenance records