P0175 on the 2023 Kia Telluride
The 2023 Kia Telluride continues with the Lambda II 3.8L GDI V6 producing 291 hp and 262 lb-ft of torque, paired with an 8-speed automatic. This popular three-row SUV uses gasoline direct injection, making carbon buildup a relevant consideration for P0175 diagnosis. Bank 2 on the Lambda II is the rear cylinder bank. At 15,000-40,000 miles typical for 2023 models, the code is less common but can occur.
Symptoms
- Check engine light on
- Fuel economy below the rated 20-26 MPG
- Rough idle or vibration at stop lights
- Black exhaust deposits
- Sluggish acceleration when fully loaded
- Possible fuel odor
Common Causes
1. MAF Sensor Contamination (High Likelihood)
Even at moderate mileage, the MAF sensor can become contaminated from PCV oil vapor or if the Telluride operates in dusty environments (off-road, construction areas, rural roads). The 3.8L V6's high airflow volume amplifies any sensor error. This is the cheapest and most common fix. A can of MAF cleaner and 10 minutes of work resolves the issue in most cases.
2. Early GDI Carbon Accumulation (Medium Likelihood)
The Lambda II 3.8L GDI begins accumulating carbon on intake valves from the first miles driven. At 15,000-40,000 miles, carbon deposits are typically light to moderate. However, Telluride owners who primarily make short trips (the vehicle's main use case as a family SUV) may see faster accumulation. While severe buildup at this mileage is unlikely, it can contribute to fuel trim imbalances in combination with other factors.
3. Upstream O2 Sensor Issue (Medium Likelihood)
Manufacturing defects or contamination can cause the Bank 2 upstream O2 sensor to read incorrectly. While uncommon at this age, it is possible. The sensor position in the rear exhaust manifold receives less cooling airflow, which can stress the sensor. Test response time with a scan tool to evaluate sensor health.
4. ECM Software Calibration (Low Likelihood)
Kia may release ECM calibration updates that refine fuel trim calculations. Check with your Kia dealer for any applicable TSBs or software updates that address fuel mixture concerns.
Family SUV Usage Pattern Impact
The Telluride excels as a family vehicle, which often means lots of short urban trips. This driving pattern keeps the engine at lower temperatures for longer periods, accelerates GDI carbon accumulation, and can leave moisture in the exhaust system that affects O2 sensor accuracy. Periodic longer highway drives help the engine reach full operating temperature and naturally burn off some deposits.
Warranty Coverage
The 2023 Telluride is under Kia's 5-year/60,000-mile basic and 10-year/100,000-mile powertrain warranty. All P0175 causes are covered at a Kia dealer at no cost.
Diagnostic Steps
- Visit a Kia dealer for warranty diagnosis.
- If DIY, clean MAF sensor as a safe first step.
- Monitor fuel trim data to confirm enrichment.
- Request TSB check and software updates at dealer.
Costs (If Out of Warranty)
MAF cleaning: $10-$15. MAF replacement: $130-$290. O2 sensor: $170-$350. Carbon cleaning: $500-$800. ECM update: $100-$200. All warranty-covered for 2023 models.