What Does P0172 Mean on Your 2024 Dodge Hornet?
A P0172 code on your 2024 Dodge Hornet means the ECM has detected a rich fuel condition on Bank 1. The 2024 Hornet features the GME 2.0L turbocharged four-cylinder engine (268 hp in the GT, or available as a plug-in hybrid R/T). Since this is an inline-4, Bank 1 is the only bank — the entire engine runs rich.
As a 2024 model, your Hornet is under warranty. This code is not common on new vehicles but can happen due to component issues or contamination.
Symptoms You Might Notice
- Check engine light on
- Reduced fuel economy
- Rough idle
- Fuel odor from the exhaust
- Soot on the exhaust tip
- Slightly reduced turbo performance
Common Causes of P0172 on the 2024 Dodge Hornet
- MAF Sensor Contamination — Factory residue or an aftermarket oiled filter can contaminate the MAF sensor.
- Boost System Leak — Intercooler piping connections can be loose from the factory or develop leaks from vibration.
- EVAP Purge Valve Defect — A factory-defective purge solenoid.
- O2 Sensor Defect — A rare manufacturing defect in the upstream oxygen sensor.
How to Diagnose the Problem
- Retrieve all DTCs — Look for companion codes.
- Check fuel trim data — Negative LTFT confirms over-fueling.
- Test MAF sensor — Compare to Stellantis specs.
- Inspect turbo piping — Check for loose clamps or hose leaks.
- Test purge valve — Bidirectional control test.
- Monitor O2 sensor — Voltage and switching analysis.
Repair Options and Cost Estimates
Your 2024 Hornet is fully covered under Stellantis' 3-year/36,000-mile basic warranty and 5-year/60,000-mile powertrain warranty.
- MAF Sensor Cleaning — DIY: $10-$15. Shop: $55-$110.
- MAF Sensor Replacement — Parts: $90-$195, labor: $55-$110. Total: $145-$305.
- Boost Pipe Repair — Parts: $50-$185, labor: $90-$200. Total: $140-$385.
- Purge Valve Replacement — Parts: $25-$70, labor: $55-$110. Total: $80-$180.
- O2 Sensor Replacement — Parts: $95-$210, labor: $80-$160. Total: $175-$370.
Can You Fix This Yourself?
Take it to the dealer — warranty has you covered. A quick MAF cleaning is safe to try yourself if you want a fast first step. Everything else should be the dealer's responsibility on a new vehicle.
Prevention Tips
- Use only OEM or quality dry air filters
- Follow the manufacturer's maintenance schedule
- Use quality gasoline
- Report drivability changes to the dealer while under warranty