What Does P0172 Mean on Your 2024 Chevrolet Equinox?
A P0172 code on the 2024 Chevrolet Equinox means the engine control module has detected that Bank 1 is running too rich. The 2024 Equinox is powered by a 1.5L turbocharged four-cylinder engine producing 175 horsepower. As an inline-four, it has only one bank, so P0172 affects the entire engine.
Too rich means more fuel is being injected than the ideal air-fuel ratio requires. This reduces fuel economy, can foul spark plugs, and may damage the catalytic converter. Since the 2024 Equinox is under factory warranty, a dealer visit is recommended.
Common Symptoms You May Notice
- Check engine light on
- Decreased fuel economy
- Rough or unsteady idle
- Black smoke from the exhaust
- Fuel smell at the tailpipe
- Sluggish acceleration
Top Causes of P0172 on the 2024 Equinox
- Dirty MAF sensor - The mass airflow sensor can become contaminated even on a newer vehicle, causing it to underreport airflow and triggering over-fueling.
- Boost or intake leak - The 1.5L turbo has charge piping that can develop leaks at connections, causing air loss after the MAF sensor measurement point.
- Faulty upstream O2 sensor - A defective oxygen sensor can cause the ECM to overcorrect with fuel. On a new vehicle, this may be a manufacturing defect covered by warranty.
- EVAP purge valve malfunction - A stuck-open purge valve floods the intake with fuel vapors, enriching the mixture.
How to Diagnose the Problem
Scan for codes and check freeze frame data. Look at STFT and LTFT values. Negative LTFT past -10% confirms the rich condition.
Check the air filter, though it should be clean on a 2024 model. Clean the MAF sensor with dedicated MAF cleaner spray. Inspect all turbo charge pipe connections for tightness.
Monitor the upstream O2 sensor with a scan tool. It should oscillate between 0.1V and 0.9V. If it stays above 0.5V, the engine is running rich.
Repair Options and Cost Estimates
- MAF sensor cleaning or replacement: Cleaning is under $10. New sensor costs $45-$140 plus $40-$85 labor.
- Boost leak repair: Parts cost $15-$60. Labor runs $60-$150.
- O2 sensor replacement: Parts are $45-$135. Labor is $60-$120.
- EVAP purge valve: Parts cost $25-$55. Labor is $45-$95.
Can You Fix This Yourself?
MAF cleaning is very easy. Checking boost hoses is simple. However, since the 2024 Equinox is under warranty, having the dealer handle repairs protects your coverage and costs nothing out of pocket.
Prevention Tips
- Follow the factory maintenance schedule for air filter replacement
- Use quality fuel from reputable stations
- Address check engine lights promptly to maintain warranty coverage
- Keep records of all maintenance for warranty claims