AutoCodes – Honda – P027E 2021 Honda CR-V

P027E 2021 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 2021 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 187

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 2021 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 2021 Honda CR-V - Cold Start Air Fuel Ratio Control System Command Lean - AutoCodes.com — P027E 2021 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 2021 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 2021 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 2021 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 2021 Honda CR-V code?

Need more information on how to fix the P027E 2021 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 P027E 2021 Honda CR-V Code

1. What does the OBDII code P027E mean on a 2021 Honda CR-V?

The code P027E indicates an issue with the Cold Start Air Fuel Ratio Control System, specifically that the system is commanding a lean air-fuel mixture during the cold start phase.

2. What are common symptoms of the P027E code in a 2021 Honda CR-V?

Symptoms may include rough idling during cold starts, decreased engine performance, poor fuel economy, or an illuminated check engine light.

3. What causes the P027E code to appear on a 2021 Honda CR-V?

Possible causes include a malfunctioning air-fuel ratio sensor, a vacuum leak, fuel injector issues, or a problem with the engine control module (ECM) programming.

4. Can driving with the P027E code damage my 2021 Honda CR-V?

While driving short-term may not cause immediate damage, prolonged driving with a lean air-fuel mixture can lead to engine overheating, increased emissions, or potential damage to internal components.

5. How is the P027E code diagnosed on a 2021 Honda CR-V?

A mechanic will use an OBDII scanner to confirm the code, inspect the air-fuel ratio sensor, check for vacuum leaks, and test the fuel delivery system for proper operation.

6. How do I fix the P027E code on a 2021 Honda CR-V?

Repairs may involve replacing a faulty air-fuel ratio sensor, fixing vacuum leaks, cleaning or replacing fuel injectors, or reprogramming the ECM if necessary.

7. Can a dirty air filter cause the P027E code on a 2021 Honda CR-V?

A dirty air filter is unlikely to directly cause this code, but it can contribute to airflow issues that may exacerbate lean conditions during a cold start.

8. Will clearing the P027E code solve the problem on a 2021 Honda CR-V?

Clearing the code will temporarily turn off the check engine light, but the underlying issue must be addressed to prevent the code from returning.

9. How much does it cost to fix the P027E code on a 2021 Honda CR-V?

Repair costs vary, but diagnosing and fixing issues like a faulty air-fuel ratio sensor or vacuum leaks can range from $100 to $500, depending on parts and labor.

10. Can a software update resolve the P027E code on a 2021 Honda CR-V?

In some cases, a software update for the ECM may resolve the issue if the problem is related to incorrect programming rather than hardware malfunction.