P0172 Nissan Code - Fuel Injection System Too Rich Bank 1
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 Faulty Front Heated Oxygen Sensor, Faulty Spark Plugs, Faulty Mass Air Flow (MAF) sensor. 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
- P0172 Nissan indicates Fuel Injection System Too Rich Bank 1.
- Common causes
- Common causes include Faulty Front Heated Oxygen Sensor, Faulty Spark Plugs, Faulty Mass Air Flow (MAF) sensor.
- 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 P0172 Nissan 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 P0172 Nissan?
- Faulty Front Heated Oxygen Sensor
- Faulty Spark Plugs
- Faulty Mass Air Flow (MAF) sensor
- Exhaust Gas Leaks
- Ignition Misfiring
- Incorrect Fuel Pressure
- Faulty Fuel Injectors
How to Fix the DTC P0172 Nissan?
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 is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0172 Nissan 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 P0172 Nissan code?
Need more information on how to fix the P0172 Nissan code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0172 Nissan code diagnosed by a professional: Find a repair shop in your area
Information for Specific Nissan Models
- P0172 2002 Nissan Altima Sedan — Fuel Injection System Too Rich Bank 1
- P0172 2003 Nissan Altima Sedan — Fuel Injection System Too Rich Bank 1
- P0172 2004 Nissan Altima Sedan — Fuel Injection System Too Rich Bank 1
- P0172 2005 Nissan Altima Sedan — Fuel Injection System Too Rich Bank 1
- P0172 2006 Nissan Altima Sedan — Fuel Injection System Too Rich Bank 1
- P0172 2008 Nissan Altima Sedan — Fuel Injection System Too Rich Bank 1
- P0172 2009 Nissan Altima Sedan — Fuel Injection System Too Rich Bank 1
- P0172 2010 Nissan Altima Sedan — Fuel Injection System Too Rich Bank 1
- P0172 2011 Nissan Altima Sedan — Fuel Injection System Too Rich Bank 1
- P0172 2012 Nissan Altima Sedan — Fuel Injection System Too Rich Bank 1
- P0172 2004 Nissan Maxima — Fuel Injection System Too Rich Bank 1
- P0172 2005 Nissan Maxima — Fuel Injection System Too Rich Bank 1
- P0172 2006 Nissan Maxima — Fuel Injection System Too Rich Bank 1
- P0172 2007 Nissan Maxima — Fuel Injection System Too Rich Bank 1
- P0172 2008 Nissan Maxima — Fuel Injection System Too Rich Bank 1
- P0172 2005 Nissan Pathfinder — Fuel Injection System Too Rich Bank 1
- P0172 2006 Nissan Pathfinder — Fuel Injection System Too Rich Bank 1
- P0172 2007 Nissan Pathfinder — Fuel Injection System Too Rich Bank 1
- P0172 2008 Nissan Pathfinder — Fuel Injection System Too Rich Bank 1
- P0172 2009 Nissan Pathfinder — Fuel Injection System Too Rich Bank 1
- P0172 2010 Nissan Pathfinder — Fuel Injection System Too Rich Bank 1
- P0172 2011 Nissan Pathfinder — Fuel Injection System Too Rich Bank 1
- P0172 2012 Nissan Pathfinder — Fuel Injection System Too Rich Bank 1
- P0172 2008 Nissan Rogue — Fuel Injection System Too Rich Bank 1
- P0172 2009 Nissan Rogue — Fuel Injection System Too Rich Bank 1
- P0172 2010 Nissan Rogue — Fuel Injection System Too Rich Bank 1
- P0172 2011 Nissan Rogue — Fuel Injection System Too Rich Bank 1
- P0172 2012 Nissan Rogue — Fuel Injection System Too Rich Bank 1
- P0172 2013 Nissan Rogue — Fuel Injection System Too Rich Bank 1
- P0172 2002 Nissan Sentra — Fuel Injection System Too Rich Bank 1
- P0172 2003 Nissan Sentra — Fuel Injection System Too Rich Bank 1
- P0172 2004 Nissan Sentra — Fuel Injection System Too Rich Bank 1
- P0172 2005 Nissan Sentra — Fuel Injection System Too Rich Bank 1
- P0172 2006 Nissan Sentra — Fuel Injection System Too Rich Bank 1
- P0172 2007 Nissan Sentra — Fuel Injection System Too Rich Bank 1
- P0172 2008 Nissan Sentra — Fuel Injection System Too Rich Bank 1
- P0172 2009 Nissan Sentra — Fuel Injection System Too Rich Bank 1
- P0172 2010 Nissan Sentra — Fuel Injection System Too Rich Bank 1
- P0172 2011 Nissan Sentra — Fuel Injection System Too Rich Bank 1
- P0172 2012 Nissan Sentra — Fuel Injection System Too Rich Bank 1
Frequently Asked Questions about P0172 Nissan Code
1. What are the common symptoms of OBDII code P0172 in a Nissan?
- Common symptoms include decreased fuel efficiency, rough idling, black smoke from the exhaust, and a strong smell of fuel.
2. What does the OBDII code P0172 "Fuel Injection System Too Rich Bank 1" mean in a Nissan?
- This code indicates that the fuel system in Bank 1 (cylinder bank 1) is delivering a fuel mixture that is too rich (too much fuel compared to air).
3. What are some possible causes of OBDII code P0172 in a Nissan?
- Common causes include a faulty oxygen sensor, issues with the fuel pressure regulator, a clogged or dirty fuel injector, a vacuum leak, or a malfunctioning mass airflow sensor.
4. How can I diagnose the OBDII code P0172 in my Nissan?
- Diagnosing this code typically involves checking the oxygen sensor readings, inspecting the fuel pressure regulator, testing the fuel injectors, checking for vacuum leaks, and verifying the operation of the mass airflow sensor.
5. Can driving with the OBDII code P0172 in a Nissan cause further damage?
- Continuing to drive with a rich fuel mixture can potentially lead to damage to the catalytic converter, oxygen sensors, and other engine components over time.
6. How can I repair OBDII code P0172 in my Nissan?
- Repair options may include replacing a faulty oxygen sensor, cleaning or replacing the fuel injectors, fixing vacuum leaks, replacing the mass airflow sensor, or addressing any other specific component causing the rich fuel mixture.
7. Is it safe to drive my Nissan with the OBDII code P0172 present?
- It is generally not recommended to drive your Nissan with this code present, as it can impact engine performance and potentially lead to further damage if not addressed promptly.
8. Can a dirty air filter trigger the OBDII code P0172 in a Nissan?
- A dirty air filter can restrict airflow, which may affect the air-fuel ratio and potentially contribute to a rich fuel mixture, triggering the P0172 code.
9. How long does it typically take to repair OBDII code P0172 in a Nissan?
- The repair time can vary depending on the specific cause of the rich fuel mixture. Simple fixes like replacing an oxygen sensor may take less time compared to diagnosing and addressing multiple issues.
10. Will resetting the OBDII code P0172 in my Nissan make it go away permanently?
- Resetting the code may temporarily clear the warning light, but if the underlying issue causing the rich fuel mixture is not resolved, the code is likely to reappear. It is important to diagnose and fix the root cause of the problem.
Discuss the causes and fixes for P0172 Nissan OBDII Code
Code P0172 Nissan comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
