P0174 on Your 2022 Honda CR-V
A P0174 trouble code on the 2022 Honda CR-V signals that the powertrain control module has found a lean air-fuel mixture on Bank 2. The 2022 CR-V uses a 1.5-liter turbocharged inline-four engine making 190 hp, or a hybrid model with a 2.0-liter four-cylinder and electric motors producing 212 hp combined. Both are inline-four engines with one bank, so a Bank 2 code is atypical, but the lean condition requires attention.
Running lean causes elevated combustion temperatures, reduced performance, and potential long-term engine damage. Getting to the root cause quickly is the smart approach.
Symptoms
- Check engine light illuminated
- Rough idle
- Acceleration hesitation
- Reduced power
- Higher engine temperatures
- Intermittent misfires
Common Causes
- Vacuum Leak - The most frequent culprit. Check all vacuum hoses, intake gaskets, PCV hoses, and turbo boost plumbing on the 1.5T model.
- Dirty MAF Sensor - Oil vapor from the turbo and crankcase ventilation system contaminates the sensor over time.
- Low Fuel Pressure - A weakening fuel pump cannot maintain pressure under load, starving the engine of fuel.
- Faulty O2 Sensor - An inaccurate oxygen sensor leads to incorrect fuel trim corrections.
Diagnostic Process
- Read all codes - Look for P0171 and related codes.
- Vacuum leak inspection - Check every hose, gasket, and connection. Use a smoke machine for best results.
- Clean the MAF sensor - Spray with MAF-specific cleaner.
- Fuel trim analysis - STFT and LTFT above +10% confirm lean operation.
- Fuel pressure test - Compare readings to Honda specs.
Repair Costs
- Vacuum hose repair - $5 to $25. Easy DIY.
- Intake manifold gasket - $25 to $70, plus $150 to $300 labor.
- MAF sensor cleaning - $10 to $25.
- MAF sensor replacement - $80 to $180, plus $50 to $100 labor.
- Fuel pump replacement - $150 to $350, plus $190 to $380 labor.
- O2 sensor replacement - $60 to $150, plus $70 to $130 labor.
DIY Feasibility
The CR-V is very accessible for DIY work. Hose inspection, MAF cleaning, and filter replacement are easy. Sensor replacements are manageable with basic tools. Fuel pump work is best for experienced mechanics.
Prevention Tips
- Inspect vacuum hoses regularly
- Change the air filter on schedule
- Use quality gasoline
- Follow Honda's maintenance intervals
- Do not ignore check engine lights