Understanding P0171 on the 2024 Kia Telluride
A P0171 code on your 2024 Kia Telluride indicates a lean fuel condition on Bank 1 of the 3.8-liter Lambda II V6 engine. This V6 produces 291 horsepower and features two cylinder banks. Bank 1, containing cylinder 1, is on the rear side of the engine near the firewall.
When the upstream O2 sensor on Bank 1 detects a persistent lean condition that exceeds the ECU's fuel trim correction ability, the P0171 code is stored and the check engine light turns on.
Symptoms
- Check engine light illuminated
- Rough or uneven idle
- Sluggish acceleration
- Decreased fuel economy
- Possible engine misfires
- Hissing sound from the engine compartment
Common Causes
- Vacuum Leaks - The V6 intake manifold has multiple vacuum connections. Leaking gaskets, cracked hoses, or loose fittings are the top cause.
- MAF Sensor Contamination - A dirty MAF sensor underreports airflow, causing lean fuel calculations.
- Fuel Delivery Issues - Weak fuel pump, clogged filter, or dirty injectors on Bank 1.
- Exhaust Leak Near O2 Sensor - An exhaust manifold leak can introduce outside air past the O2 sensor, creating a false lean reading.
Diagnosis Process
- Full code scan - Check all codes, especially P0174 and misfire codes.
- Bank comparison fuel trims - Compare Bank 1 and Bank 2 trims to determine if the issue is bank-specific.
- Smoke test - Find vacuum leaks in the V6 intake system.
- MAF and fuel pressure tests - Verify both meet specifications.
- Exhaust manifold inspection - Check for leaks near the Bank 1 O2 sensor.
Repair Costs
- Vacuum hose or gasket repair - $75 to $325
- MAF sensor replacement - $175 to $400
- Fuel pump replacement - $525 to $950
- Exhaust manifold gasket - $250 to $550
Diagnostic fee: $120 to $175.
Warranty
Your 2024 Telluride is fully covered under Kia's 5-year/60,000-mile basic warranty and 10-year/100,000-mile powertrain warranty. All P0171 repairs should be handled by your Kia dealer at no cost.
Prevention Tips
- Maintain the Telluride per Kia's schedule
- Replace air filters on time
- Use top-tier gasoline
- Report any performance changes to the dealer promptly
- Allow the dealer to install software updates at each service