AutoCodes – Volkswagen – P1664 Volkswagen

P1664 Volkswagen Code - Injector Activation Current Circuit

Quick Answer

P1664 Volkswagen indicates Injector Activation Current Circuit. 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: P1664 Volkswagen indicates Injector Activation Current Circuit.
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 18,608

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 Sep 07, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1664 Volkswagen Description

OBDII Code P1664 Volkswagen - Injector Activation Current Circuit - AutoCodes.com — P1664 Volkswagen Code - Injector Activation Current Circuit

What does this mean?

What are the Possible Causes of the DTC P1664 Volkswagen?

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 P1664 Volkswagen?

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 P1664 Volkswagen 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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Need more information on how to fix the P1664 Volkswagen 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 P1664 Volkswagen Code

1. What are the common symptoms of OBDII code P1664 in a Volkswagen related to the Injector Activation Current Circuit?

- Common symptoms include rough idling, poor engine performance, misfires, and potential stalling issues.

2. What are the possible causes of OBDII code P1664 in a Volkswagen?

- Potential causes may include faulty injector wiring, a defective fuel injector, problems with the Engine Control Module (ECM), or issues with the injector activation circuit.

3. How can I diagnose the OBDII code P1664 on my Volkswagen?

- A thorough inspection of the injector wiring, checking the fuel injector for proper operation, and testing the ECM for any malfunctions are recommended diagnostic steps.

4. Can a bad fuel injector cause the OBDII code P1664 in a Volkswagen?

- Yes, a faulty fuel injector can contribute to triggering code P1664 due to its impact on the injector activation current circuit.

5. What are some repair tips for fixing OBDII code P1664 in a Volkswagen?

- Repair tips may include repairing or replacing damaged injector wiring, testing and potentially replacing the fuel injector, and ensuring proper functioning of the ECM.

6. Is it safe to continue driving my Volkswagen with OBDII code P1664 present?

- It is not recommended to continue driving with this code as it can lead to further engine damage and potential safety hazards. It's best to address the issue promptly.

7. Can a DIY enthusiast fix OBDII code P1664 in a Volkswagen?

- Depending on the level of expertise, DIY enthusiasts may be able to address simpler causes like checking and repairing wiring issues. However, more complex issues may require professional assistance.

8. How much does it typically cost to repair OBDII code P1664 in a Volkswagen?

- Repair costs can vary based on the specific cause of the code and the required parts and labor. It's advisable to consult a mechanic for an accurate estimate.

9. Will resetting the OBDII code P1664 in my Volkswagen make it disappear permanently?

- Simply resetting the code may temporarily clear the error, but if the underlying issue is not addressed, the code is likely to reappear after a certain period of driving.

10. Are there any preventative measures to avoid OBDII code P1664 in a Volkswagen?

- Regular maintenance, such as checking and maintaining the fuel system components, inspecting wiring harnesses, and addressing any engine performance issues promptly, can help prevent code P1664 from occurring.