AutoCodes – Acura – P16A4 Acura

P16A4 Acura Code - Engine Control Module Internal Malfunction

Quick Answer

The Engine Control Module (ECM) monitors it's internal Electrically Erasable Programmable Read-Only Memory (EEPROM). Common causes include Faulty Engine Control Module (ECM), Engine Control Module (ECM) harness is open or shorted, Engine Control Module (ECM) 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: P16A4 Acura indicates Engine Control Module Internal Malfunction.
Common causes: Common causes include Faulty Engine Control Module (ECM), Engine Control Module (ECM) harness is open or shorted, Engine Control Module (ECM) 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 1,314

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 Jan 10, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P16A4 Acura Description

The Engine Control Module (ECM) monitors it's internal Electrically Erasable Programmable Read-Only Memory (EEPROM). The ECM sets the OBDII code when the internal (EPROM is not to factory specifications.

OBDII Code P16A4 Acura - Engine Control Module Internal Malfunction - AutoCodes.com — P16A4 Acura Code - Engine Control Module Internal Malfunction

What does this mean?

What are the Possible Causes of the DTC P16A4 Acura?

Faulty Engine Control Module (ECM)
Engine Control Module (ECM) harness is open or shorted
Engine Control Module (ECM) circuit poor electrical connection

How to Fix the DTC P16A4 Acura?

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 P16A4 Acura 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 P16A4 Acura code?

Need more information on how to fix the P16A4 Acura code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P16A4 Acura 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 P16A4 Acura Code

1. What are common symptoms of OBDII code P16A4 in an Acura?

Symptoms may include engine misfires, rough idling, poor acceleration, and the illumination of the Check Engine Light.

2. What does the OBDII code P16A4 indicate in an Acura?

Code P16A4 typically points towards an internal malfunction within the Engine Control Module (ECM) of the vehicle.

3. What are possible causes of the Engine Control Module internal malfunction in an Acura?

Potential causes may include software glitches, electrical issues, damaged wiring, or a faulty ECM component.

4. How can I diagnose OBDII code P16A4 in my Acura?

Diagnosis usually involves using an OBDII scanner to retrieve the code, checking for other related codes, inspecting wiring connections, and performing a thorough ECM inspection.

5. Is it safe to continue driving my Acura with OBDII code P16A4 present?

It is not recommended to drive your vehicle with this code active, as it can lead to further damage and potentially unsafe driving conditions.

6. Can I reset the Check Engine Light caused by code P16A4 in my Acura?

While you can clear the code temporarily, it is crucial to address the underlying issue causing the code to prevent future problems.

7. How can I repair OBDII code P16A4 in my Acura?

Repair options may include updating ECM software, repairing damaged wiring, replacing faulty ECM components, or seeking assistance from a professional mechanic.

8. Will replacing the Engine Control Module fix OBDII code P16A4 in my Acura?

Replacing the ECM may resolve the issue, but it is essential to ensure the root cause of the malfunction is properly diagnosed and addressed to prevent future occurrences.

9. Can a DIY enthusiast fix OBDII code P16A4 in an Acura?

While some basic inspections and repairs can be done by a DIY enthusiast, resolving complex ECM internal malfunctions may require specialized tools and expertise best handled by a professional.

10. How much does it cost to repair OBDII code P16A4 in an Acura?

Repair costs can vary depending on the exact cause of the issue, the extent of damage, and whether you choose to address it yourself or seek professional help. It's advisable to obtain quotes from reputable mechanics for an accurate estimate.