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AutoCodes – Toyota – P0174 2007 Toyota Camry

P0174 2007 Toyota Camry Code - Air/Fuel Mixture System Too Lean Bank 2

Quick Answer

The fuel trim is related to the feedback compensation value, not to the basic injection time. 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 2007 Toyota Camry indicates Air/Fuel Mixture 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.
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Code Popularity 6,852
How popular is this code, among other codes? Low
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Table of contents Created and updated by William Orellana on Jun 19, 2020
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Code P0174 2007 Toyota Camry Description

The fuel trim is related to the feedback compensation value, not to the basic injection time. The fuel trim consists of both the short-term and the long-term fuel trims. The short-term fuel trim is fuel compensation that is used to constantly maintain the air-fuel ratio at stoichiometric levels. The signal from the Air-Fuel Ratio (A/F) sensor indicates whether the air-fuel ratio is rich or lean compared to the stoichiometric ratio. This triggers a reduction in the fuel injection volume if the air-fuel ratio is rich and an increase in the fuel injection volume if it is lean.Factors such as individual engine differences, wear over time and changes in operating environment cause short-term fuel trim to vary from the central value. The long-term fuel trim, which controls overall fuel compensation, compensates for long-term deviations in the fuel trim from the central value caused by the short-term fuel trim compensation. If both the short-term and long-term fuel trims are lean or rich beyond predetermined values, it is interpreted as a malfunction, and the ECM illuminates the MIL and sets a DTC.
OBDII Code P0174 2007 Toyota Camry - Air/Fuel Mixture System Too Lean Bank 2 - AutoCodes.com
P0174 2007 Toyota Camry Code - Air/Fuel Mixture System Too Lean Bank 2
What does this mean?

What are the Possible Causes of the DTC P0174 2007 Toyota Camry?

  • 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 2007 Toyota Camry?

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.

What does this mean?

Code Tech Notes

If the P0171 is combined with the P0174 code, it's very likely that the problem is caused by an intake leak. If there are no intake leaks, the next step is to replace the air filter and clean the airflow meter. If the problem persists the front oxygen (O2) sensor may need to be replaced.

There is a factory service bulletin for the following Toyota models:
2007 - 2008 Toyota Camry
2007 and 2008 Toyota Camry Factory Service Bulletin OBDII Code P0174

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0174 2007 Toyota Camry 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.

Need more information about the P0174 2007 Toyota Camry code?

Need more information on how to fix the P0174 2007 Toyota Camry code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0174 2007 Toyota Camry code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0174 2007 Toyota Camry Code

1. What are the common symptoms of OBDII code P0174 on a 2007 Toyota Camry?

- Common symptoms include rough idling, poor acceleration, engine misfires, and a decrease in fuel efficiency.

2. What does the OBDII code P0174 "Air/Fuel Mixture System Too Lean Bank 2" mean for a 2007 Toyota Camry?

- This code indicates that the air-to-fuel ratio in the engine's Bank 2 is imbalanced, with too much air and not enough fuel being delivered.

3. What are the possible causes of OBDII code P0174 on a 2007 Toyota Camry?

- Common causes include a vacuum leak, faulty oxygen sensor, clogged fuel filter, dirty mass airflow sensor, or a malfunctioning fuel injector.

4. How can I diagnose the source of OBDII code P0174 on my 2007 Toyota Camry?

- Diagnose by checking for vacuum leaks, testing the oxygen sensor, inspecting the fuel filter, cleaning the mass airflow sensor, and testing the fuel injectors.

5. Can a dirty air filter trigger OBDII code P0174 on a 2007 Toyota Camry?

- Yes, a dirty air filter can disrupt the air-to-fuel ratio and lead to a lean condition, triggering the P0174 code.

6. Can driving with OBDII code P0174 on a 2007 Toyota Camry cause further damage?

- Continued driving with this code can potentially damage the engine and catalytic converter, so it's recommended to address the issue promptly.

7. How can I reset OBDII code P0174 on a 2007 Toyota Camry after making repairs?

- Use an OBDII scanner to clear the code after addressing the underlying issue, then monitor the vehicle for any returning trouble codes.

8. Are there any maintenance tips to prevent OBDII code P0174 from appearing on a 2007 Toyota Camry?

- Regular maintenance, such as replacing the air filter, checking for vacuum leaks, and using high-quality fuel, can help prevent the recurrence of the P0174 code.

9. Should I attempt to repair OBDII code P0174 on a 2007 Toyota Camry myself, or seek professional help?

- While some simple fixes like replacing the air filter can be done by DIYers, diagnosing and repairing more complex issues should be left to experienced mechanics to ensure proper resolution.

10. How long can I safely drive with OBDII code P0174 on a 2007 Toyota Camry before addressing the issue?

- It's best to address the P0174 code as soon as possible to prevent potential damage to the engine and emission control system.

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