Understanding P0175 on the 2024 Volvo XC90
The 2024 Volvo XC90 uses Volvo's mild-hybrid Drive-E powertrain lineup, with the B5 (turbo, 247 hp) and B6 (turbo + supercharged, 295 hp) as the primary options alongside the T8 Recharge plug-in hybrid. All variants use the 2.0L four-cylinder engine architecture. A P0175 code indicates the system is running too rich, with the ECM unable to lean out the fuel mixture through normal trim adjustments.
What You'll Experience
- Check engine light active on the dashboard
- Lower fuel economy than expected
- Dark or black exhaust smoke
- Rough idle quality
- Possible reduced engine performance notification
- Fuel odor at the tailpipe
Top Causes on the 2024 XC90
1. MAF Sensor Contamination — High Likelihood
Even on a brand-new 2024 model, the MAF sensor can be compromised by oiled aftermarket air filters or unusual environmental conditions. Volvo's Bosch hot-film MAF sensor sits in the intake duct and is the primary input for fuel calculations. Contamination causes under-reporting of airflow, leading to over-fueling.
2. Upstream O2 Sensor Issue — Medium Likelihood
The wideband oxygen sensor provides real-time air-fuel ratio feedback. A manufacturing defect or contamination from fuel additives can cause early failure. On Volvo's Drive-E engines, the O2 sensor is integrated close to the turbocharger outlet, experiencing extreme temperatures that can accelerate wear.
3. Fuel Injector Defect — Medium Likelihood
The direct injection system operates at pressures above 2,500 PSI. On a new vehicle, a manufacturing defect in a fuel injector can cause it to over-deliver fuel. This is uncommon but would be a warranty repair item.
4. Software Calibration Issue — Low Likelihood
On newer vehicles, ECM software calibration can occasionally be the root cause. Volvo periodically releases software updates that adjust fuel maps and sensor calibrations. A dealer visit may reveal a Technical Service Bulletin (TSB) or software update that addresses the P0175 condition.
Diagnostic Approach
- Check for TSBs — Have the dealer check for any Technical Service Bulletins related to P0175 or fuel trim issues on the 2024 XC90.
- Review fuel trim data — Using VIDA or an advanced scan tool, check STFT and LTFT values. Positive values above +15-20% confirm the rich condition.
- Inspect the intake system — Verify the OEM air filter is installed and check for loose ducting connections.
- Test the MAF sensor — Compare live readings to factory specifications for the B5 or B6 engine variant.
- Check O2 sensor response — Monitor the upstream sensor for proper response time and signal range.
Cost and Warranty
The 2024 XC90 includes Volvo's 4-year/50,000-mile new vehicle warranty. P0175 causes should be covered:
- MAF sensor cleaning: $10–$15 (DIY)
- MAF sensor replacement: $250–$475 (warranty)
- O2 sensor replacement: $300–$575 (warranty)
- Fuel injector replacement: $375–$675 (warranty)
- Software update: $0–$150 (usually free under warranty)
Take It to the Dealer
On a 2024 XC90, this is a warranty issue. Volvo's dealer network uses the VIDA diagnostic system, which provides far more detailed data than aftermarket scan tools. Let Volvo's technicians diagnose and repair under warranty rather than attempting extensive DIY troubleshooting on a new vehicle.
Is It Safe to Drive?
You can safely drive to the dealer. Avoid sustained high-load driving (heavy towing, aggressive mountain driving) as the rich condition generates additional heat. The XC90's catalytic converter is expensive to replace ($2,200–$3,800), so prompt dealer attention is the smart move.