What Does P0172 Mean on Your 2022 Chevrolet Camaro?
When your 2022 Chevrolet Camaro sets a P0172 code, the powertrain control module is telling you that Bank 1 is running too rich. The 2022 Camaro offers the 2.0L turbocharged four-cylinder (275 hp), the 3.6L V6 (335 hp), and the 6.2L LT1 V8 (455 hp). On the V6 and V8, Bank 1 is the driver side. The 2.0L turbo has one bank.
A rich mixture means excess fuel relative to air. This costs you in both performance and fuel economy, and can destroy catalytic converters on the high-output V8 models. Camaro owners who modify their cars with aftermarket intakes are especially susceptible.
Common Symptoms You May Notice
- Check engine light on
- Worse fuel economy
- Rough or surging idle
- Black exhaust smoke
- Fuel odor at the tailpipe
- Reduced power and throttle response
Top Causes of P0172 on the 2022 Camaro
- Dirty MAF sensor - Over-oiled aftermarket filters or general contamination causes the MAF to underread airflow. This is the number one cause on modified Camaros.
- Leaking direct injection fuel injector - The 6.2L LT1 and 3.6L V6 use direct injection. A leaking Bank 1 injector dumps excess fuel.
- Failing upstream O2 sensor - A slow or biased oxygen sensor on Bank 1 causes the PCM to overcorrect with fuel.
- EVAP purge valve stuck open - A malfunctioning purge valve sends excess fuel vapors into the intake.
How to Diagnose the Problem
Pull codes and check freeze frame data. Review Bank 1 STFT and LTFT. Negative LTFT past -10% confirms the rich running condition.
Check for over-oiled aftermarket air filters first. Clean the MAF with dedicated MAF cleaner. Monitor the upstream O2 sensor on Bank 1. It should toggle between 0.1V and 0.9V.
If the MAF and O2 sensor check out, investigate fuel injectors and fuel pressure. The direct injection system requires professional-grade diagnostics for accurate pressure testing.
Repair Options and Cost Estimates
- MAF sensor cleaning or replacement: Cleaning under $10. New sensor $55-$185 plus $50-$105 labor.
- Fuel injector replacement: Parts $45-$135 per injector. Labor $230-$485 on the V8.
- O2 sensor replacement: Parts $55-$170. Labor $80-$165.
- EVAP purge valve: Parts $30-$65. Labor $55-$115.
Can You Fix This Yourself?
MAF cleaning is easy and should be the first thing you try. O2 sensor replacement is moderate. Fuel injector replacement on the direct injection V8 requires specialized tools and experience.
Prevention Tips
- Use a dry-type aftermarket filter or avoid over-oiling cotton filters
- Use premium Top Tier fuel as recommended
- Run a fuel system cleaner every 5,000 miles
- Address check engine lights promptly