What Does P0171 Mean on Your 2022 Volvo S60?
If your 2022 Volvo S60 has a P0171 code, the engine control module detected a lean air-fuel mixture. The 2022 S60 uses Volvo's 2.0-liter four-cylinder: the B5 (turbo, 247 hp) or T8 Recharge (turbo+supercharged hybrid, 455 hp combined). As an inline engine with one bank, P0171 means the whole engine is running lean. The ECM is injecting extra fuel to compensate.
Symptoms You Might Notice
- Check engine light on
- Rough or unstable idle
- Hesitation during acceleration
- Fuel economy below the typical 26-33 MPG
- Reduced boost response
- Subtle vibration at low RPMs
Common Causes of P0171 on the 2022 Volvo S60
- Vacuum or Boost Leak (35% likelihood) — Check charge pipes, intercooler connections, and intake manifold gasket. The turbo system plumbing is a common source of leaks.
- PCV System Failure (25% likelihood) — Volvo's PCV valve and oil trap system is a well-documented maintenance point. Failure causes vacuum leaks and contaminates the MAF sensor.
- MAF Sensor Contamination (25% likelihood) — Oil vapors from the PCV system or a dirty air filter can coat the sensor element.
- Fuel Delivery Issue (15% likelihood) — The HPFP or direct injectors may not deliver enough fuel under boost conditions.
How to Diagnose the Problem
- Full code scan — Use Volvo VIDA/DiCE or a quality OBD-II scanner for all codes and freeze frame data.
- Fuel trim analysis — Monitor STFT and LTFT at idle and under boost. Consistent positive trims above +10% confirm lean operation.
- PCV system check — A critical first step on any Volvo. Inspect the PCV valve, oil trap, and all associated hoses.
- Smoke test — The most effective way to find hidden vacuum and boost leaks.
- Fuel pressure monitoring — Check fuel rail pressure at idle and under various loads.
Repair Options and Cost Breakdown
- Vacuum or boost leak repair: $130–$380. DIY cost is $15–$70. The S60's engine bay is reasonably accessible.
- PCV system repair: $180–$500. Parts cost $70–$200. Moderate DIY project.
- MAF sensor replacement: $150–$300. Part cost is $60–$140. Easy DIY job.
- Fuel system repair: $450–$1,000. Parts run $250–$600. Professional repair recommended.
Prevention Tips
- Use premium 91+ octane fuel
- Replace the air filter every 20,000 miles
- Use Volvo-approved oil to protect the PCV and turbo system
- Have the PCV system inspected at major service intervals
- Address any unusual engine sounds promptly
Is It Safe to Drive?
Short commutes are safe with P0171. The S60 is a sports sedan that may see spirited driving — avoid that until the lean condition is resolved. Get it diagnosed within two weeks.