🔧 FixIt
🟡

P0174 on TOYOTA HIGHLANDER

System Too Lean Bank 2

NHTSA Reports
3
Severity
Medium
Most Affected
2019, 2017
Crashes / Fires
0 / 0
Source: NHTSA Complaints Database · SAE J2012

What P0174 Means on Your TOYOTA HIGHLANDER

P0174 is a diagnostic trouble code indicating: System Too Lean Bank 2. This code relates to the fuel and air metering system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

3 TOYOTA HIGHLANDER owners have reported this issue to NHTSA across model years 2017-2019. Most reports come from the 2019, 2017 model years. The most commonly reported component is Fuel/Propulsion System (66.7% of reports).

Real TOYOTA HIGHLANDER Owner Reports

Source: NHTSA Complaints Database

"Today (8/26/2025) my wife experienced the engine light kicked on and that the AWD system needed to be checked. After fueling up it made knocking noises and difficulty starting, and took two times to start up. Ran an OBD scan and this is what it says, which is related to fuel pump low pressure."

— 2017 TOYOTA HIGHLANDER owner · FUEL/PROPULSION SYSTEM · Filed 08/26/2025

"Vehicle hesitates and sputters upon acceleration, loss of power, and stalls during operation. Trouble codes P0191, P0171, P0174, and P0107B have generated in combination."

— 2019 TOYOTA HIGHLANDER owner · FUEL/PROPULSION SYSTEM · Filed 03/08/2026

"Vehicle check engine turned on to check AWD system after about 2 days when filling with gas the engine wouldn't start and had Low brake power message on dashboard."

— 2019 TOYOTA HIGHLANDER owner · UNKNOWN OR OTHER,SERVICE BRAKES,FUEL/PROPULSION SYSTEM · Filed 06/06/2023

All reports filed by vehicle owners directly with the U.S. Department of Transportation.

📊 Complaint Trend by Model Year

1
'17
2
'19

Common Causes on TOYOTA HIGHLANDER

Based on NHTSA complaint component analysis for this vehicle.

FUEL/PROPULSION SYSTEM 66.7%
UNKNOWN or OTHER,SERVICE BRAKES,FUEL/PROPULSION SYSTEM 33.3%

What To Do Next

  1. 1
    Check for recalls on YOUR VIN

    Go to nhtsa.gov/recalls and enter your VIN. If your vehicle is covered, repairs are free.

  2. 2
    Get a proper diagnosis

    A code alone doesn't tell you the exact failed part. A diagnostic at a shop ($50–$150) pinpoints the root cause before you spend money on parts.

  3. 3
    Compare repair quotes

    Get 2–3 quotes. Dealer vs. independent shop prices often differ 30–50% for the same repair.

Frequently Asked Questions

What does P0174 mean on a TOYOTA HIGHLANDER? ▾
P0174 indicates: System Too Lean Bank 2. This is a fuel and air metering code. 3 TOYOTA HIGHLANDER owners have reported this to NHTSA.
What are the most common causes of P0174 on TOYOTA HIGHLANDER? ▾
Based on 3 NHTSA reports, the most commonly cited components are: Fuel/Propulsion System, Unknown Or Other,Service Brakes,Fuel/Propulsion System. These percentages are based on the component field in owner complaints.
Is P0174 serious on my TOYOTA HIGHLANDER? ▾
Of 3 NHTSA reports for this code on TOYOTA HIGHLANDER, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic.
What should I do if my TOYOTA HIGHLANDER shows P0174? ▾
1) Check for recalls on your VIN at nhtsa.gov/recalls. 2) Get a professional diagnosis — a code alone doesn't identify the exact failed part. 3) Get 2-3 repair estimates to compare.

P0174 on Other Vehicles

→ All codes reported on TOYOTA HIGHLANDER