P0174 Hyundai Code - System Too Lean Bank 2
Quick Answer
With the Air/Fuel Mixture Ratio Self-Learning Control, the actual mixture ratio can be brought closely to the theoretical mixture ratio based on the mixture ratio feedback signal from the heated oxygen sensors 1. Common causes include Intake air leaks, Faulty front heated oxygen sensor, Ignition misfiring. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0174 Hyundai indicates System Too Lean Bank 2.
- Common causes
- Common causes include Intake air leaks, Faulty front heated oxygen sensor, Ignition misfiring.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P0174 Hyundai Description
In case the amount of the compensation value is extremely large (The actual mixture ratio is too lean.), the ECM judges the condition as the fuel injection system malfunction and light up the MIL (2 trip detection logic).
What are the Possible Causes of the DTC P0174 Hyundai?
- Intake air leaks
- Faulty front heated oxygen sensor
- Ignition misfiring
- Faulty fuel injectors
- Exhaust gas leaks
- Incorrect fuel pressure
- Lack of fuel
- Faulty Mass Air Flow (MAF) sensor
- Incorrect Positive Crankcase Ventilation (PCV) hose connection
How to Fix the DTC P0174 Hyundai?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0174 Hyundai code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P0174 Hyundai Code
No Frequently Asked Questions about P0174 Hyundai Code found.
Discuss the causes and fixes for P0174 Hyundai OBDII Code
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This problem's been haunting me for a few months now and I finally found the fix. Along with fault code P0174 I also had P1166 & P1167 O2 sensor bank 1 & 02 sensor bank 2, fuel pressure regulator / fuel pump bad? List of items changed: 02 sensor's on bank 1 & 2 ,air filter, (MAF) Mass air flow sensor, (IAC) inlet air controller, fuel pump assembly, fuel pressure regulator. After replacing all these items which had set me back over $1000 The problem still existed and my car still had the hiccups and died at idle. So I decided to try yet another MAF but this time an OEM part from the dealership. $150 not cheap but a friend told me that when it comes to automotive electronics always use OEM parts. I installed the new MAF and now it's running smoothly. I might add that all the parts that I replaced were bought on the internet. I tried to save money but in the end I ended spending more than I needed.
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I've replaced all parts from the dealership besides the fuel items recommended. The light is still on after 5 years. The light started coming on the week I bought the car. The dealership gave up on helping me find the problem after 4x's or so of bringing it in. Every year I have to trick the inspection people in order to pass inspection. Today I took it to a different mechanic,it's been to 6 different ones,and they said nothing is wrong with the vehicle. But the check engine light still keeps staying on. This is so frustrating!!!! 2007 Hyundai Tucson
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