What Does P0172 Mean on Your 2024 Chevrolet Colorado?
A P0172 code on the 2024 Chevrolet Colorado means the engine control module has detected that Bank 1 is running too rich. The redesigned 2024 Colorado is powered by a 2.7L turbocharged four-cylinder engine producing 237 horsepower in base form or 310 horsepower in the high-output version. As an inline-four, there is only one bank, so P0172 affects the entire engine.
The 2.7L turbo uses direct injection and forced induction, which means boost system leaks are a potential cause that did not exist on the previous generation's naturally aspirated engines. A rich condition wastes fuel and can damage the catalytic converter if not addressed.
Common Symptoms You May Notice
- Check engine light on
- Lower fuel economy
- Rough or unsteady idle
- Black exhaust smoke
- Fuel smell from the tailpipe
- Reduced power under load
Top Causes of P0172 on the 2024 Colorado
- Dirty MAF sensor - Truck use often means dusty environments. A contaminated MAF underreports airflow, causing excess fueling.
- Turbo boost leak - The 2.7L turbo has charge piping that can develop leaks at connections or clamps, causing unmetered air loss after the MAF sensor.
- Faulty upstream O2 sensor - A defective oxygen sensor, possibly a manufacturing defect on a new vehicle, causes incorrect fuel calculations.
- Leaking fuel injector - A direct injection injector that does not seal properly delivers excess fuel.
How to Diagnose the Problem
Scan for codes and review freeze frame data. Check STFT and LTFT values. Negative LTFT beyond -10% confirms the rich condition.
Check the air filter and clean the MAF sensor with dedicated cleaner. Inspect all turbo charge pipe connections. A smoke test is the best method for finding boost leaks.
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-$80. Labor $75-$185.
- O2 sensor replacement: Parts $50-$155. Labor $70-$140.
- Fuel injector replacement: Parts $45-$125 per injector. Labor $190-$400.
Can You Fix This Yourself?
Since the 2024 Colorado is under factory warranty, take it to the dealer. All repairs for manufacturer defects should be covered at no cost to you.
Prevention Tips
- Follow the factory maintenance schedule
- Replace the air filter more frequently in dusty work conditions
- Use quality fuel
- Address check engine lights promptly for warranty coverage