1. What is P0174?

The P0174 code means the engine is running too lean on Bank 2. This occurs when the air-fuel mixture has too much air or not enough fuel. Common in Ford F150, Chevy Malibu, and Volkswagen Jetta.

2. Causes of P0174

• Vacuum leaks in intake manifold or hoses
• Dirty or faulty MAF sensor
• Weak fuel pump or clogged fuel filter
• Leaking or dirty fuel injectors
• Faulty oxygen (O2) sensor

3. Symptoms

• Check Engine Light (CEL) illuminated
• Rough idle or stalling
• Loss of power during acceleration
• Poor fuel economy
• Engine misfires on Bank 2

4. Vehicles Affected

• Ford: F150, Explorer, Escape
• Chevrolet: Malibu, Silverado, Equinox
• Volkswagen: Jetta, Passat, Golf

Long-tail keyword examples: "P0174 Ford F150 lean condition" and "Chevy Malibu P0174 fix".

5. Diagnosis with UR800

The ICARZONE UR800 scanner helps confirm and fix P0174 effectively:

• Read and confirm P0174 with live freeze-frame data
• Monitor fuel trim readings (long and short term)
• Check MAF sensor values against specs
• Inspect vacuum system for leaks
• Perform injector balance test

6. Fixes

• Repair vacuum leaks (hoses, intake gasket)
• Clean or replace MAF sensor
• Replace clogged fuel filter or weak fuel pump
• Clean or replace fuel injectors
• Replace faulty O2 sensor if needed

7. Prevention

• Regularly replace air filter
• Use quality fuel to prevent injector clogging
• Perform fuel system cleaning every 20,000 miles
• Inspect intake hoses during routine service
• Scan with UR800 at each maintenance interval

8. Frequently Asked Questions

9. Summary

The P0174 System Too Lean (Bank 2) code indicates a fuel mixture issue often caused by vacuum leaks, fuel system faults, or MAF/O2 sensor problems. Diagnose and fix efficiently with the ICARZONE UR800 scanner.