AutoCodes – Honda – P0172 2019 Honda CR-V

P0172 2019 Honda CR-V Code - Fuel System Too Rich 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: P0172 2019 Honda CR-V indicates Fuel System Too Rich 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 548

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0172 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 rich) or less, the PCM detects a malfunction in the fuel metering components and stores a Diagnostic Trouble Code (DTC).

OBDII Code P0172 2019 Honda CR-V - Fuel System Too Rich Bank 1 - AutoCodes.com — P0172 2019 Honda CR-V Code - Fuel System Too Rich Bank 1

What does this mean?

What are the Possible Causes of the DTC P0172 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 P0172 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0172 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 P0172 2019 Honda CR-V code?

Need more information on how to fix the P0172 2019 Honda CR-V code? Get Access to Factory Service Manuals

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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 P0172 2019 Honda CR-V Code

1. What does OBDII code P0172 on a 2019 Honda CR-V mean?

- OBDII code P0172 indicates that the fuel system is too rich on Bank 1 of the engine in the 2019 Honda CR-V.

2. What are the common symptoms of OBDII code P0172 in a 2019 Honda CR-V?

- Common symptoms of code P0172 include decreased fuel efficiency, black smoke from the exhaust, rough idling, and a noticeable gasoline odor.

3. What are the possible causes of OBDII code P0172 in a 2019 Honda CR-V?

- The common causes of code P0172 in a 2019 Honda CR-V include a faulty oxygen sensor, a dirty or clogged fuel injector, a malfunctioning mass airflow sensor, or a vacuum leak.

4. How can I diagnose the OBDII code P0172 on my 2019 Honda CR-V?

- To diagnose code P0172, you can use an OBDII scanner to read the code and check for any other related codes. Additionally, you can inspect the oxygen sensor, fuel injectors, and mass airflow sensor for any signs of damage or malfunction.

5. Can a dirty air filter trigger OBDII code P0172 on a 2019 Honda CR-V?

- Yes, a dirty air filter can disrupt the air-fuel mixture, leading to a rich fuel condition and triggering code P0172 on a 2019 Honda CR-V.

6. How can I repair OBDII code P0172 on my 2019 Honda CR-V?

- Depending on the root cause, repairing code P0172 may involve replacing the oxygen sensor, cleaning or replacing the fuel injector, fixing a vacuum leak, or addressing any other issues affecting the air-fuel ratio.

7. Is driving with OBDII code P0172 on a 2019 Honda CR-V safe?

- It is not recommended to drive for an extended period with code P0172 as it can lead to reduced fuel efficiency and potential damage to the engine components.

8. Can bad spark plugs trigger OBDII code P0172 in a 2019 Honda CR-V?

- While bad spark plugs may not directly cause code P0172, they can contribute to an inefficient combustion process, which may result in a rich fuel mixture and trigger the code.

9. How soon should I address OBDII code P0172 on my 2019 Honda CR-V?

- It is advisable to address code P0172 promptly to prevent further damage to the engine and ensure optimal fuel efficiency and performance of your 2019 Honda CR-V.

10. Will resetting the OBDII code P0172 on my 2019 Honda CR-V make it go away permanently?

- Resetting the code may temporarily clear the warning light, but if the underlying issue causing code P0172 is not addressed, the code is likely to reappear. It is essential to diagnose and fix the root cause of the problem to prevent code recurrence.