AutoCodes – Generic – P16DA

P16DA 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 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 3,860
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 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 - Electric Vacuum Pump Relay 1 Stuck Off - AutoCodes.com
P16DA Code - Electric Vacuum Pump Relay 1 Stuck Off

What are the Possible Causes of the DTC P16DA?

  • 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?

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 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 P16DA code?

Need more information on how to fix the P16DA code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P16DA code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

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 Code

1. What are the common symptoms of OBDII code P16DA (Electric Vacuum Pump Relay 1 Stuck Off)?

Common symptoms include the check engine light illuminating, reduced engine performance, and potential loss of power brakes.

2. What causes OBDII code P16DA to trigger?

This code is typically triggered when the electric vacuum pump relay 1 is stuck in the "off" position, causing a disruption in the vacuum system's operation.

3. How serious is OBDII code P16DA?

While the code itself may not cause immediate safety concerns, it can lead to issues with power brake assistance and engine performance, so it is recommended to address it promptly.

4. Can I continue driving with OBDII code P16DA present?

It is generally not recommended to continue driving with this code active, as it can affect the vehicle's braking system and overall performance.

5. How can I diagnose OBDII code P16DA?

Diagnosis typically involves using a scan tool to read the code, inspecting the vacuum pump relay, checking for loose connections or damaged wiring, and testing the relay's functionality.

6. What are some possible DIY repair tips for OBDII code P16DA?

DIY repair tips include checking and cleaning the relay connections, inspecting the wiring for any damage, and replacing the electric vacuum pump relay if necessary.

7. Can a faulty electric vacuum pump relay cause other issues in the vehicle?

Yes, a faulty electric vacuum pump relay can potentially cause issues with the brake system, engine performance, and overall drivability of the vehicle.

8. How much does it cost to repair OBDII code P16DA?

The cost of repair can vary depending on the extent of the issue and whether you choose to do the repair yourself or seek professional help. Replacement relays are often relatively affordable.

9. Is it possible for OBDII code P16DA to reoccur after repair?

If the root cause of the issue is not properly addressed during repair, there is a possibility for the code to reoccur. It is essential to diagnose and fix the underlying problem thoroughly.

10. Can a professional mechanic help with diagnosing and repairing OBDII code P16DA?

Yes, a professional mechanic with experience in diagnosing and repairing automotive electrical systems can assist in accurately pinpointing the issue and performing the necessary repairs for OBDII code P16DA.

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