What Does P0172 Mean on Your 2022 Dodge Challenger?
A P0172 code on your 2022 Dodge Challenger tells you that Bank 1 is running too rich. The 2022 Challenger offers engines ranging from the 3.6L Pentastar V6 to the supercharged 6.2L Hellcat. On all V-configuration engines, Bank 1 is the driver's side cylinder bank. A rich condition means excess fuel is present in the combustion mixture.
Whether you're chasing quarter-mile times or cruising the boulevard, a rich condition undermines both performance and efficiency. Most fixes are affordable and straightforward.
Symptoms You Might Notice
- Check engine light on
- Reduced fuel economy
- Rough idle
- Black exhaust smoke
- Strong fuel smell from the tailpipe
- Slightly reduced throttle response
Common Causes of P0172 on the 2022 Dodge Challenger
- Dirty MAF Sensor — A leading cause, especially with aftermarket air intakes and oiled filters common on Challengers.
- Stuck-Open Purge Valve — A known Mopar/Stellantis issue where the EVAP purge solenoid fails open.
- Failing O2 Sensor (Bank 1) — The upstream oxygen sensor may be degraded or responding slowly.
- Leaking Fuel Injector — Seal degradation on HEMI injectors, especially with MDS thermal cycling.
How to Diagnose the Problem
- Scan for all codes — Check for companion codes.
- Check fuel trim data — Compare banks to determine systemic vs. localized issue.
- Test MAF sensor — Verify readings match Stellantis specs.
- Test purge valve — Bidirectional control test.
- Monitor O2 sensor — Check switching speed and voltage range.
- Test fuel injectors — Balance test to find leakers.
Repair Options and Cost Estimates
- MAF Sensor Cleaning — DIY: $10-$15. Shop: $55-$115.
- MAF Sensor Replacement — Parts: $75-$180, labor: $55-$115. Total: $130-$295.
- Purge Valve Replacement — Parts: $25-$65, labor: $55-$115. Total: $80-$180.
- O2 Sensor Replacement — Parts: $75-$195, labor: $90-$175. Total: $165-$370.
- Fuel Injector Replacement — Parts: $50-$150 each, labor: $190-$400. Total: $240-$550.
Can You Fix This Yourself?
The Challenger is one of the most DIY-friendly cars on the road. Its spacious engine bay gives you plenty of room to work. MAF cleaning, purge valve replacement, and even O2 sensor swaps are all within reach for a home mechanic with basic tools.
Prevention Tips
- Be conservative with aftermarket filter oil — less is more
- Replace air filters on schedule
- Use premium fuel for HEMI engines
- Follow Dodge's recommended maintenance intervals