AutoCodes – Honda – P0171 2017 Honda CR-V

P0171 2017 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 2017 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 358

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 2017 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 2017 Honda CR-V - Fuel Injection System Too Lean Bank 1 - AutoCodes.com — P0171 2017 Honda CR-V Code - Fuel Injection System Too Lean Bank 1

What does this mean?

What are the Possible Causes of the DTC P0171 2017 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 2017 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 2017 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 2017 Honda CR-V code?

Need more information on how to fix the P0171 2017 Honda CR-V code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0171 2017 Honda CR-V 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 P0171 2017 Honda CR-V Code

1. What does OBDII code P0171 mean on a 2017 Honda CR-V?

The code P0171 indicates that the fuel injection system on Bank 1 is running too lean, meaning there is too much air and not enough fuel in the mixture.

2. What are the common symptoms of OBDII code P0171 on a 2017 Honda CR-V?

Common symptoms of code P0171 include rough idling, poor acceleration, hesitation, decreased fuel efficiency, and possible stalling.

3. What are the possible causes of OBDII code P0171 on a 2017 Honda CR-V?

Potential causes of code P0171 on a 2017 Honda CR-V include a vacuum leak, faulty oxygen sensor, dirty or clogged fuel injectors, low fuel pressure, or a malfunctioning mass airflow sensor.

4. How can I diagnose the root cause of OBDII code P0171 on my 2017 Honda CR-V?

To diagnose the cause of code P0171, you can perform a visual inspection of vacuum hoses, check for any signs of leaks, test the oxygen sensor, inspect the mass airflow sensor, and check fuel pressure.

5. What are some repair tips for fixing OBDII code P0171 on a 2017 Honda CR-V?

Repair tips for resolving code P0171 include fixing any vacuum leaks, cleaning or replacing the oxygen sensor, cleaning fuel injectors, addressing low fuel pressure issues, and cleaning or replacing the mass airflow sensor.

6. Can driving with OBDII code P0171 on a 2017 Honda CR-V cause further damage?

Continuing to drive with code P0171 may lead to decreased engine performance, reduced fuel efficiency, potential damage to the catalytic converter, and ultimately more costly repairs if left unresolved.

7. How much does it typically cost to repair OBDII code P0171 on a 2017 Honda CR-V?

The cost of repairing code P0171 on a 2017 Honda CR-V can vary depending on the underlying issue, but it may range from a simple fix like replacing a sensor to more complex repairs involving the fuel system.

8. Can I reset OBDII code P0171 on a 2017 Honda CR-V with a diagnostic tool?

Resetting code P0171 with a diagnostic tool may clear the code temporarily, but it's crucial to diagnose and fix the underlying issue to prevent the code from reoccurring and ensure the vehicle operates properly.

9. Is it safe to drive my 2017 Honda CR-V with OBDII code P0171 present?

While you can drive with code P0171, it's advisable to address the issue promptly to avoid potential engine damage, reduced performance, and increased fuel consumption.

10. How often should I check for OBDII code P0171 on my 2017 Honda CR-V?

It's recommended to regularly monitor your vehicle's performance and promptly address any signs or symptoms of code P0171 to prevent further issues and maintain optimal engine operation.