AutoCodes – Honda – P027F 2019 Honda CR-V

P027F 2019 Honda CR-V Code - Cold Start Air Fuel Ratio Control System Command Rich

Quick Answer

The cold start emission reduction strategy controls air-fuel ratio to lean when the engine is started at cold conditions to lower the emission while the catalyst is not warmed up enough. Common causes include Faulty Powertrain Control Module (PCM), Powertrain Control Module harness is open or shorted, Powertrain Control Module circuit poor electrical connection. 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: P027F 2019 Honda CR-V indicates Cold Start Air Fuel Ratio Control System Command Rich.
Common causes: Common causes include Faulty Powertrain Control Module (PCM), Powertrain Control Module harness is open or shorted, Powertrain Control Module circuit poor electrical connection.
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 160

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 16, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P027F 2019 Honda CR-V Description

The cold start emission reduction strategy controls air-fuel ratio to lean when the engine is started at cold conditions to lower the emission while the catalyst is not warmed up enough. If the commanded air-fuel ratio is too lean or too rich compared to the target air-fuel ratio, the Powertrain Control Module (PCM) detects a malfunction and stores a Diagnostic Trouble Code (DTC).

OBDII Code P027F 2019 Honda CR-V - Cold Start Air Fuel Ratio Control System Command Rich - AutoCodes.com — P027F 2019 Honda CR-V Code - Cold Start Air Fuel Ratio Control System Command Rich

What does this mean?

What are the Possible Causes of the DTC P027F 2019 Honda CR-V?

Faulty Powertrain Control Module (PCM)
Powertrain Control Module harness is open or shorted
Powertrain Control Module circuit poor electrical connection

How to Fix the DTC P027F 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 P027F 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 P027F 2019 Honda CR-V code?

Need more information on how to fix the P027F 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 P027F 2019 Honda CR-V Code

1. What does the OBDII code P027F mean on a 2019 Honda CR-V?

P027F indicates an issue with the Cold Start Air-Fuel Ratio Control System, which is running too rich, meaning there's excess fuel compared to the air in the mixture.

2. What are the common symptoms of code P027F in a 2019 Honda CR-V?

Symptoms may include poor fuel economy, rough idling during cold starts, black smoke from the exhaust, and possibly an illuminated check engine light.

3. What causes the P027F code to appear on a 2019 Honda CR-V?

Common causes include a faulty coolant temperature sensor, malfunctioning fuel injectors, a dirty mass air flow sensor, or issues with the ECM (Engine Control Module).

4. Can a dirty air filter trigger the P027F code?

Yes, a dirty or clogged air filter can restrict airflow, potentially causing the air-fuel ratio to become too rich during cold starts.

5. How is the P027F code diagnosed?

A mechanic will typically use a scan tool to confirm the code, inspect sensors like the coolant temperature sensor and mass air flow sensor, and check the fuel system for leaks or injector issues.

6. Can I drive my 2019 Honda CR-V with the P027F code?

While it may be possible to drive, prolonged operation with this code can lead to decreased fuel efficiency, engine damage, or harm to the catalytic converter.

7. How do I fix the P027F code on a 2019 Honda CR-V?

Repairs might include cleaning or replacing the mass air flow sensor, replacing a faulty coolant temperature sensor, repairing fuel injectors, or updating/reprogramming the ECM.

8. Can a bad oxygen sensor cause the P027F code?

Yes, a malfunctioning oxygen sensor may provide incorrect air-fuel ratio readings, contributing to the code.

9. Does the P027F code always require a sensor replacement?

No, sometimes the issue can be resolved by cleaning components, fixing wiring problems, or addressing software updates in the ECM.

10. How much does it cost to fix the P027F code on a 2019 Honda CR-V?

Repair costs vary depending on the root cause, but sensor replacements typically range from $100 to $300, while more extensive repairs like injector work can cost more.