AutoCodes – Honda – P0171 2019 Honda CR-V

P0171 2019 Honda CR-V Code - Fuel Injection System Too Lean Bank 1

Quick Answer

The Powertrain Control Module (PCM) detects the oxygen content in the exhaust gas from the Air/Fuel Ratio (A/F) Sensor (Sensor 1) signal voltage, and it uses fuel feedback control to maintain the optimal air/fuel ratio. Common causes include Faulty Fuel Pump, Faulty Fuel Injector, Fuel Pressure Regulator. 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: P0171 2019 Honda CR-V indicates Fuel Injection System Too Lean Bank 1.
Common causes: Common causes include Faulty Fuel Pump, Faulty Fuel Injector, Fuel Pressure Regulator.
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 361

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 14, 2023

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0171 2019 Honda CR-V Description

The Powertrain Control Module (PCM) detects the oxygen content in the exhaust gas from the Air/Fuel Ratio (A/F) Sensor (Sensor 1) signal voltage, and it uses fuel feedback control to maintain the optimal air/fuel ratio. The air/fuel ratio coefficient for correcting the amount of injected fuel is the short-term fuel trim. The PCM varies short-term fuel trim continuously to keep the air/fuel ratio close to the stoichiometric ratio for all driving conditions. Long-term fuel trim is computed from short-term fuel trim and is used to regulate long-term deviation from the stoichiometric air/fuel ratio, which occurs when fuel metering components deteriorate with age or system failures occur. In addition, long-term fuel trim is stored in the PCM memory and is used to determine when fuel metering components malfunction. When long-term fuel trim is higher than normal, which is about 1 (0 %), the amount of injected fuel must be increased, and when lower than normal, it must be decreased. If long-term fuel trim is normal (too lean) or more, the PCM detects a malfunction in the fuel metering components and stores a Diagnostic Trouble Code (DTC).

OBDII Code P0171 2019 Honda CR-V - Fuel Injection System Too Lean Bank 1 - AutoCodes.com — P0171 2019 Honda CR-V Code - Fuel Injection System Too Lean Bank 1

What does this mean?

What are the Possible Causes of the DTC P0171 2019 Honda CR-V?

Faulty Fuel Pump
Faulty Fuel Injector
Fuel Pressure Regulator
Fuel line failure
Fuel supply system failure
Faulty Mass Air Flow (MAF) Sensor
Faulty Manifold Absolute Pressure (MAP) Sensor
Faulty A/F Sensor (Sensor 1)
Faulty Secondary HO2S (Sensor 2)
Vacuum hose mis installed
Throttle body air leak
Intake manifold air leak
Faulty EVAP Canister Purge Valve

How to Fix the DTC P0171 2019 Honda CR-V?

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 highly 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 Mass Air Flow (MAF) Sensor. If the problem persists, the A/F Sensor (Sensor 1) may need to be replaced.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0171 2019 Honda CR-V 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 P0171 2019 Honda CR-V code?

Need more information on how to fix the P0171 2019 Honda CR-V code? Get Access to Factory Service Manuals

Need Help with the Code?

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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 P0171 2019 Honda CR-V Code

1. What does OBDII code P0171 mean for my 2019 Honda CR-V?

The code P0171 indicates that the fuel injection system on bank 1 is operating too lean, meaning there is an imbalance between the air and fuel mixture.

2. What are some common symptoms of a P0171 code in a Honda CR-V?

Common symptoms of a P0171 code include rough idling, engine hesitation, decreased fuel efficiency, and potentially a check engine light illuminated on the dashboard.

3. What are the possible causes of a P0171 code in a 2019 Honda CR-V?

Some potential causes of a P0171 code in a Honda CR-V include a vacuum leak, faulty oxygen sensor, clogged fuel filter, malfunctioning mass airflow sensor, or issues with the fuel injectors.

4. How can I diagnose a P0171 code on my 2019 Honda CR-V?

Diagnosing a P0171 code typically involves checking for vacuum leaks, inspecting the oxygen sensor, testing the fuel pressure, examining the mass airflow sensor, and ensuring the fuel injectors are functioning properly.

5. Can I drive my Honda CR-V with a P0171 code?

While it is possible to drive your Honda CR-V with a P0171 code, it is not recommended as it can lead to poor engine performance and decreased fuel efficiency. It's best to address the issue promptly.

6. How can I repair a P0171 code on my 2019 Honda CR-V?

Repairing a P0171 code may involve fixing any vacuum leaks, replacing the oxygen sensor, cleaning or replacing the fuel filter, addressing issues with the mass airflow sensor, or cleaning or replacing the fuel injectors.

7. Are there any DIY tips for fixing a P0171 code on a Honda CR-V?

Some DIY tips for addressing a P0171 code include checking for visible vacuum leaks, cleaning the mass airflow sensor, and inspecting the air intake system for any obstructions or leaks.

8. How much does it typically cost to repair a P0171 code on a 2019 Honda CR-V?

The cost of repairing a P0171 code can vary depending on the specific cause of the issue. It's advisable to consult with a mechanic for an accurate diagnosis and cost estimate.

9. Will a P0171 code affect the overall performance of my Honda CR-V?

Yes, a P0171 code can negatively impact the performance of your Honda CR-V by causing rough idling, decreased fuel efficiency, and potential engine hesitation. It's important to address this issue promptly.

10. How often should I check for a P0171 code in my 2019 Honda CR-V?

It is recommended to regularly monitor your Honda CR-V for any check engine lights or unusual symptoms that may indicate a P0171 code. If you notice any issues, it's best to have the vehicle inspected by a professional.