AutoCodesHonda – P16DA Honda

P16DA Honda Code - Electric Vacuum Pump Relay 1 Stuck Off

Quick Answer

The Powertrain Control Module (PCM) monitors the Electric Vacuum Pump Relay 1. Common causes include Faulty Electric Vacuum Pump Relay 1, Electric Vacuum Pump Relay 1 harness is open or shorted, Electric Vacuum Pump Relay 1 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
P16DA Honda indicates Electric Vacuum Pump Relay 1 Stuck Off.
Common causes
Common causes include Faulty Electric Vacuum Pump Relay 1, Electric Vacuum Pump Relay 1 harness is open or shorted, Electric Vacuum Pump Relay 1 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 1,142
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jan 10, 2020
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Code P16DA Honda Description

The Powertrain Control Module (PCM) monitors the Electric Vacuum Pump Relay 1. The PCM sets the OBDII code when the Electric Vacuum Pump Relay 1 is not to factory specifications.
OBDII Code P16DA Honda - Electric Vacuum Pump Relay 1 Stuck Off - AutoCodes.com
P16DA Honda Code - Electric Vacuum Pump Relay 1 Stuck Off

What are the Possible Causes of the DTC P16DA Honda?

  • Faulty Electric Vacuum Pump Relay 1
  • Electric Vacuum Pump Relay 1 harness is open or shorted
  • Electric Vacuum Pump Relay 1 circuit poor electrical connection

How to Fix the DTC P16DA 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 P16DA 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.

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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 P16DA Honda Code

What does the OBDII code P16DA mean for a Honda vehicle?

The code P16DA indicates that the Electric Vacuum Pump Relay 1 is stuck in the "off" position, which may affect the operation of the vacuum pump that assists in various vehicle functions.

What are the common symptoms of the P16DA code?

Common symptoms include a warning light on the dashboard, reduced engine performance, difficulties with brake boost, and potential issues with the power steering system.

What could cause the P16DA code to trigger?

Causes may include a faulty electric vacuum pump, a defective relay, wiring issues, or problems within the vehicle’s control module.

How can I diagnose the issue related to the P16DA code?

To diagnose the issue, inspect the electric vacuum pump and relay for any visible damage, check the wiring for shorts or corrosion, and use a multimeter to test the relay and pump functionality.

Can I drive my Honda if the P16DA code is present?

While you can technically drive the vehicle, it is not recommended as it may lead to decreased braking performance and other safety concerns. It's best to address the issue promptly.

What are some potential repair solutions for the P16DA code?

Potential repairs include replacing the electric vacuum pump, replacing the relay, repairing any damaged wiring, or reprogramming the vehicle’s control module if necessary.

Is it possible to reset the P16DA code without fixing the issue?

Yes, you can clear the code using an OBDII scanner, but the underlying problem will likely cause the code to return if not properly addressed.

How can I prevent the P16DA code from recurring?

Regular maintenance of your vehicle's electrical system, ensuring proper connections, and addressing any warning signs promptly can help prevent the recurrence of the P16DA code.

What should I do if the P16DA code keeps coming back after repairs?

If the code persists, consider having a professional mechanic conduct a thorough diagnostic to uncover any underlying issues that may not have been initially identified.

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