P0175 on the 2022 Ford Maverick
The P0175 code on your 2022 Ford Maverick indicates a rich fuel condition detected by the PCM. The Maverick is available with two powertrain options: the standard 2.5L Atkinson-cycle hybrid (191 combined hp) or the optional 2.0L EcoBoost turbocharged four-cylinder (250 hp). The P0175 diagnosis differs between these engines since the hybrid operates with start-stop cycling while the EcoBoost runs continuously.
Compact Truck, Modern Engines
The Maverick sits on the C2 platform shared with the Escape and Bronco Sport. Both engines use transverse mounting with front-wheel or all-wheel drive. The hybrid's 2.5L uses port injection and Atkinson cycle, while the 2.0L EcoBoost uses high-pressure direct injection with turbocharging. These differences affect both the causes and the diagnostic approach for P0175.
What You Will Notice
- Check engine light on the digital display
- Fuel economy below the rated 42 MPG city (hybrid) or 23/30 MPG (EcoBoost)
- Engine runs rougher than normal
- Dark exhaust emissions, especially on the EcoBoost under boost
- Fuel smell from exhaust
- On the hybrid, engine may run more frequently than expected
Causes by Engine Type
For the 2.0L EcoBoost:
1. MAF Sensor Contamination
The EcoBoost MAF sensor can accumulate dust and PCV residue. Truck use often involves more demanding environments than a sedan. Clean the MAF sensor as your first diagnostic step.
2. O2 Sensor Degradation
The turbo exhaust heat accelerates O2 sensor wear. At 20,000-40,000 miles on a 2022 model, early sensor failure is possible but uncommon. Test with live data for switching speed and voltage range.
3. Direct Injector Issue
The four high-pressure injectors can develop carbon deposits or seal problems. One bad injector on a four-cylinder represents 25% of fuel delivery. Check for companion misfire codes.
4. Boost Leak
Charge air system leaks after the MAF sensor create rich conditions as described in other EcoBoost vehicles.
For the 2.5L Hybrid:
1. O2 Sensor Degradation from Hybrid Cycling
Like the Prius and Sienna hybrids, the Maverick hybrid's engine starts and stops frequently. This thermal cycling accelerates O2 sensor wear. The sensor endures rapid temperature swings that degrade the sensing element over time.
2. MAF Sensor Contamination
The hybrid's port-injected 2.5L has a simpler intake path, but the MAF sensor can still accumulate contamination. PCV blow-by during warm-up phases contributes to residue buildup.
3. Port Injector Leak
The 2.5L uses port injection only. An injector that does not seal when the engine shuts off can drip fuel into the intake runner. This pooled fuel creates a rich spike on the next engine start. Over many start cycles, the ECM adapts its fuel trims and eventually stores P0175.
4. EVAP Purge Valve
A purge valve stuck open on the hybrid introduces continuous fuel vapor into the intake, enriching the mixture during engine-on periods.
Diagnostic Steps
- Identify your engine (2.5L hybrid or 2.0L EcoBoost)
- Scan for codes and review freeze frame data
- On the hybrid, force engine on via AC maximum to monitor fuel trims
- Clean the MAF sensor on either engine
- Test O2 sensor response with live data
- EcoBoost: check boost system for leaks
- Hybrid: check EVAP purge valve operation
- Inspect injectors for leaks or malfunction
Repair Costs
MAF cleaning: under $15. O2 sensor: $150-$340. Direct injector (EcoBoost): $280-$650. Port injector (hybrid): $120-$300. EVAP purge valve: $80-$200. Boost repair (EcoBoost): $50-$250. The 2022 Maverick is under Ford's powertrain warranty through 2027.
Should You Worry?
P0175 is moderate priority. The Maverick's strong selling point is fuel economy, especially the hybrid. Running rich undermines this advantage significantly. Fix it promptly to restore the Maverick's efficiency advantage and protect the catalytic converter from prolonged rich exposure.