Understanding P0175 on Your 2022 Dodge Hornet
The Dodge Hornet brought a turbocharged compact crossover to Stellantis's lineup, powered by a 2.0L turbocharged four-cylinder engine producing 268 hp (or the 1.3L turbo plug-in hybrid in the R/T). If your 2022 Hornet is throwing a P0175 code, the engine control module has detected that bank 2 is running too rich. On the inline-four engine, "bank 2" refers to a sensor grouping rather than a separate cylinder bank — this code indicates the downstream or secondary fuel control loop is detecting excess fuel.
Symptoms You'll Likely Notice
- Illuminated check engine light
- Reduced fuel economy from the normally efficient turbo engine
- Faint black smoke from the exhaust, particularly during boost
- Rough idle or subtle engine shudder
- Fuel smell from the tailpipe
- Possible boost-related hesitation during hard acceleration
Common Causes on the Hornet's Turbo Engine
1. MAF Sensor Issues
The 2.0L turbo engine in the Hornet relies heavily on accurate MAF readings to calculate boost-compensated fuel delivery. A contaminated or drifting MAF sensor will cause incorrect fuel calculations across the entire RPM range, but it's most noticeable under boost where fuel enrichment is already elevated. Cleaning costs $10–$15 for spray; replacement is $110–$240 for the Hornet's specific MAF unit.
2. Leaking Fuel Injectors
The Hornet's 2.0L uses direct fuel injection operating at extremely high pressures (up to 2,900 psi). At these pressures, even minor injector seal degradation or tip deposits can cause fuel delivery errors. A single leaking injector can trigger P0175. Injector cleaning service costs $150–$280; replacement is $120–$200 per injector plus labor.
3. Boost Pressure Sensor or Wastegate Issues
Turbocharged engines add fuel during boost events. If the boost pressure sensor reads incorrectly high or the wastegate fails to regulate boost properly, the ECM adds excess fuel for engine protection (fuel enrichment). This creates a persistently rich condition. Boost sensor replacement runs $80–$180; wastegate actuator repair costs $200–$450.
4. O2 Sensor Malfunction
The wideband oxygen sensor on the Hornet's turbo engine operates differently from traditional narrow-band sensors. If the wideband sensor becomes contaminated or fails, it can send incorrect air-fuel ratio data causing the ECM to add fuel. Replacement of the wideband sensor costs $180–$350 due to the more expensive sensor technology.
Diagnostic Approach
- Scan for all codes — look for boost-related codes (P0234, P0299) alongside P0175
- Check freeze frame data — note if the code set during boost or at idle
- Monitor fuel trim data — LTFT consistently negative indicates rich correction
- Inspect the MAF sensor and intercooler piping for leaks or contamination
- Check boost pressure with a scan tool — compare actual vs. desired boost
- Verify fuel pressure at the high-pressure fuel rail using dealer-level diagnostics
Is It Safe to Drive?
Short trips are fine, but avoid aggressive driving that builds boost. The turbo engine's catalytic converter is close-coupled and particularly sensitive to rich exhaust gases. On the Hornet, the turbo-mounted catalyst is integrated and expensive to replace — potentially $1,000–$2,000. Get the code diagnosed within a week and avoid heavy-throttle driving until then.
DIY or Professional?
MAF sensor cleaning is a simple DIY task on the Hornet. Beyond that, the turbocharged direct-injection fuel system is more complex than a naturally aspirated setup. High-pressure fuel system work requires specialized tools and knowledge. Unless you have experience with turbo DI engines, professional diagnosis is recommended. Given the Hornet's newness, check warranty coverage first — the 5-year/60,000-mile powertrain warranty should cover most causes.