AutoCodes – Honda – P027E 2018 Honda CR-V

P027E 2018 Honda CR-V Code - Cold Start Air Fuel Ratio Control System Command Lean

Quick Answer

The cold start emission reduction strategy controls air-fuel ratio to lean when the engine is started under 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: P027E 2018 Honda CR-V indicates Cold Start Air Fuel Ratio Control System Command Lean.
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 226

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 P027E 2018 Honda CR-V Description

The cold start emission reduction strategy controls air-fuel ratio to lean when the engine is started under 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 P027E 2018 Honda CR-V - Cold Start Air Fuel Ratio Control System Command Lean - AutoCodes.com — P027E 2018 Honda CR-V Code - Cold Start Air Fuel Ratio Control System Command Lean

What does this mean?

What are the Possible Causes of the DTC P027E 2018 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 P027E 2018 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 P027E 2018 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 P027E 2018 Honda CR-V code?

Need more information on how to fix the P027E 2018 Honda CR-V code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P027E 2018 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 P027E 2018 Honda CR-V Code

1. What does the OBDII code P027E mean on a 2018 Honda CR-V?

P027E indicates a problem with the Cold Start Air-Fuel Ratio Control System, specifically that the system is commanding a lean air-fuel mixture during engine warm-up.

2. What are the common symptoms of the P027E code?

Symptoms may include rough idle during cold starts, poor engine performance, reduced fuel efficiency, and in some cases, the check engine light illuminating.

3. What causes the P027E code on a 2018 Honda CR-V?

Common causes include a faulty air-fuel ratio sensor, issues with the fuel injectors, a vacuum leak, or a problem with the engine control module (ECM).

4. Can a dirty mass airflow sensor trigger the P027E code?

Yes, a dirty or faulty mass airflow (MAF) sensor can cause incorrect air-fuel ratio readings, potentially triggering the P027E code.

5. How do I diagnose the P027E code in my Honda CR-V?

Start by using an OBDII scanner to confirm the code, then inspect the air-fuel ratio sensor, vacuum lines, MAF sensor, and fuel delivery components for damage or irregularities.

6. Is it safe to drive with the P027E code?

Driving with the P027E code is not recommended, as it can lead to poor engine performance and potential damage to engine components if the air-fuel ratio remains unbalanced.

7. How do I fix the P027E code on a 2018 Honda CR-V?

Repairs may include replacing a faulty air-fuel ratio sensor, cleaning or replacing the MAF sensor, fixing vacuum leaks, or addressing fuel injector issues.

8. Can a software update for the ECM resolve the P027E code?

In some cases, an ECM software update from a Honda dealership may resolve the issue if it is related to a programming error.

9. Do I need professional help to fix the P027E code?

While basic checks like inspecting sensors and vacuum lines can be done at home, professional diagnosis is recommended to avoid misdiagnosis and unnecessary repairs.

10. How much does it cost to repair the P027E code on a 2018 Honda CR-V?

Repair costs vary depending on the root cause but typically range from $100 to $500, with air-fuel ratio sensor replacement being one of the more common expenses.