What Does P0172 Mean on Your 2020 Chevrolet Camaro?
A P0172 code on the 2020 Chevrolet Camaro means the engine control module has detected that Bank 1 is running too rich. The 2020 Camaro comes with several engine options: the 2.0L turbocharged four-cylinder (275 hp), the 3.6L V6 (335 hp), and the 6.2L LT1 V8 (455 hp) in the SS. On the V6 and V8, Bank 1 is the driver side. The 2.0L turbo has only one bank.
A rich condition on a performance car like the Camaro is particularly concerning because it reduces power output, wastes fuel, and can damage the catalytic converters, which are expensive on the V8 models. Getting this diagnosed quickly protects both performance and your wallet.
Common Symptoms You May Notice
- Check engine light on
- Reduced fuel economy
- Rough or unstable idle
- Black smoke from the exhaust
- Fuel smell at the tailpipe
- Reduced throttle response and power
Top Causes of P0172 on the 2020 Camaro
- Contaminated MAF sensor - Aftermarket cold air intakes with oiled filters are very popular on the Camaro and are a leading cause of MAF contamination, which triggers over-fueling.
- Leaking fuel injector - The 6.2L LT1 uses direct injection. The 3.6L V6 also uses DI. A leaking injector on Bank 1 delivers excess fuel.
- Faulty upstream O2 sensor - A degraded oxygen sensor on Bank 1 provides incorrect data for fuel trim corrections.
- Boost leak (2.0L turbo only) - On the turbocharged four-cylinder, a charge pipe or intercooler hose leak causes unmetered air loss and over-fueling.
How to Diagnose the Problem
Scan for codes and check freeze frame data. Review Bank 1 STFT and LTFT. Negative LTFT beyond -10% confirms the rich condition.
If you have an aftermarket intake, check whether the filter is over-oiled. Clean the MAF sensor with dedicated MAF cleaner spray. This is the most common fix on Camaros with aftermarket intakes.
Monitor the Bank 1 upstream O2 sensor with live data. It should oscillate between 0.1V and 0.9V. On the 2.0L turbo, also check for boost leaks with a smoke test.
Test fuel pressure. The 6.2L LT1 direct injection system operates at very high pressures that typically require professional-grade diagnostic equipment.
Repair Options and Cost Estimates
- MAF sensor cleaning or replacement: Cleaning under $10. New sensor $55-$180 plus $50-$100 labor.
- Fuel injector replacement: Parts $45-$130 per injector. Labor $225-$475 on the V8.
- O2 sensor replacement: Parts $55-$165. Labor $80-$160.
- Boost leak repair (2.0T): Parts $20-$75. Labor $70-$170.
Can You Fix This Yourself?
MAF cleaning is easy and the first step for any Camaro with P0172. O2 sensor replacement is moderate. Fuel injector work on the direct injection V8 is advanced and requires specialized tools.
Prevention Tips
- Do not over-oil aftermarket air filters
- Consider a dry-type filter for your aftermarket intake
- Use Top Tier fuel for cleaner injectors
- Run fuel system cleaner every 5,000 miles