AutoCodes – Honda – P0203 Honda

P0203 Honda Code - No. 3 Cylinder Injector Circuit Malfunction

Quick Answer

The injector supplies fuel to the engine and is controlled by the Powertrain Control Module (PCM) ON/OFF command. Common causes include Faulty No, 3 Cylinder Injector, No. 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: P0203 Honda indicates No. 3 Cylinder Injector Circuit Malfunction.
Common causes: Common causes include Faulty No, 3 Cylinder Injector, No.
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 808

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 15, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0203 Honda Description

The injector supplies fuel to the engine and is controlled by the Powertrain Control Module (PCM) ON/OFF command. In the PCM, the injector driver receives a drive command from the Central processing unit (CPU) and drives the injector. The CPU monitors injector currents and returns a signal from the injector driver to monitor the terminal voltage of PCM. If the monitored conditions are abnormal for a specified time, the PCM detects a malfunction and stores a Diagnostic Trouble Code (DTC).

OBDII Code P0203 Honda - No. 3 Cylinder Injector Circuit Malfunction - AutoCodes.com — P0203 Honda Code - No. 3 Cylinder Injector Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC P0203 Honda?

Faulty No. 3 Cylinder Injector
No. 3 Cylinder Injector harness is open or shorted
No. 3 Cylinder Injector circuit poor electrical connection
Faulty Injector Relay
Faulty Powertrain Control Module (PCM)
Faulty High Pressure Fuel Pump

How to Fix the DTC P0203 Honda?

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 P0203 Honda 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 P0203 Honda code?

Need more information on how to fix the P0203 Honda code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0203 Honda code diagnosed by a professional: Find a repair shop in your area

Information for Specific Honda Models

P0203 2016 Honda CR-V — No. 3 Cylinder Injector Circuit Malfunction
P0203 2017 Honda CR-V — No. 3 Cylinder Injector Circuit Malfunction
P0203 2018 Honda CR-V — No. 3 Cylinder Injector Circuit Malfunction
P0203 2019 Honda CR-V — No. 3 Cylinder Injector Circuit Malfunction
P0203 2020 Honda CR-V — No. 3 Cylinder Injector Circuit Malfunction
P0203 2021 Honda CR-V — No. 3 Cylinder Injector Circuit Malfunction

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 P0203 Honda Code

What does OBDII code P0203 mean on a Honda?

Code P0203 indicates a malfunction in the No. 3 cylinder injector circuit, meaning the injector may not be operating properly due to an electrical issue.

What are the common symptoms of code P0203 in a Honda?

Symptoms include engine misfires, rough idle, reduced fuel efficiency, poor acceleration, and possibly the Check Engine Light illuminating.

What causes the P0203 code on a Honda?

Common causes include a faulty fuel injector, damaged wiring or connectors, issues with the injector driver circuit, or problems with the engine control module (ECM).

Can I drive my Honda with code P0203?

While the vehicle may still be drivable, it’s not recommended due to potential engine damage, poor performance, and increased emissions.

How do I diagnose code P0203 on a Honda?

Start by inspecting the wiring and connectors for the No. 3 injector, check for continuity in the circuit, and test the injector itself for proper operation.

What tools are needed to fix code P0203 on a Honda?

You may need a multimeter, a scan tool capable of reading live data, and possibly basic hand tools for accessing the injector and wiring.

How do I fix code P0203 on a Honda?

Repairs may include replacing a damaged injector, repairing or replacing faulty wiring or connectors, or addressing ECM-related issues.

How much does it cost to fix code P0203 on a Honda?

Costs vary but typically range from $100 to $500 depending on whether the injector, wiring, or ECM needs repair or replacement.

Can a dirty fuel injector cause code P0203 in a Honda?

Yes, a clogged or dirty injector can sometimes lead to poor operation and trigger this code, though electrical issues are more common.

Can a bad ECM cause code P0203 on a Honda?

Yes, if the ECM fails to properly control the injector circuit, it can result in the P0203 code being set.

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