AutoCodes – Volkswagen – P0066 Volkswagen

P0066 Volkswagen Code - Air Assisted Injector Control Circuit Or Circuit Low

Quick Answer

This Diagnostic Trouble Code (DTC) is stored when a fault is detected with the air assisted injector circuit. Common causes include Faulty Air Assisted Injector, Air Assisted Injector harness open or shorted, Air Assisted Injector 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: P0066 Volkswagen indicates Air Assisted Injector Control Circuit Or Circuit Low.
Common causes: Common causes include Faulty Air Assisted Injector, Air Assisted Injector harness open or shorted, Air Assisted Injector 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 7,227

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 12, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0066 Volkswagen Description

This Diagnostic Trouble Code (DTC) is stored when a fault is detected with the air assisted injector circuit. Air is injected and allowed mix with the fuel to create more finely atomized fuel. This leads to more stable combustion.

OBDII Code P0066 Volkswagen - Air Assisted Injector Control Circuit Or Circuit Low - AutoCodes.com — P0066 Volkswagen Code - Air Assisted Injector Control Circuit Or Circuit Low

What does this mean?

What are the Possible Causes of the DTC P0066 Volkswagen?

Faulty Air Assisted Injector
Air Assisted Injector harness open or shorted
Air Assisted Injector poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0066 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 P0066 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.

Need more information about the P0066 Volkswagen code?

Need more information on how to fix the P0066 Volkswagen code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0066 Volkswagen 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 P0066 Volkswagen Code

1. What are the common symptoms of OBDII code P0066 in a Volkswagen related to the air assisted injector control circuit?

Symptoms may include rough idling, decreased engine performance, and potential stalling of the vehicle.

2. What are the possible causes of OBDII code P0066 in a Volkswagen?

Potential causes could be a faulty air assisted injector, damaged wiring or connectors in the control circuit, or a malfunctioning PCM.

3. How can I diagnose the issue related to OBDII code P0066 in my Volkswagen?

You can use a diagnostic scan tool to read the code, inspect the air assisted injector and its connections, and check for any visible signs of damage in the circuit.

4. What are some repair tips for resolving OBDII code P0066 in a Volkswagen?

Try cleaning the air assisted injector, repairing or replacing any damaged wiring or connectors, and resetting the fault code to see if the issue persists.

5. Can I drive my Volkswagen with OBDII code P0066 present?

It's not recommended to drive for an extended period with this code active, as it could lead to further engine damage or unsafe driving conditions.

6. How serious is OBDII code P0066 in a Volkswagen?

While the severity may vary, it's important to address this code promptly to prevent potential engine performance issues or further damage.

7. Can a DIY enthusiast fix OBDII code P0066 in a Volkswagen?

Depending on your skill level and access to tools, some individuals may be able to address this code themselves by following repair guides or consulting with a professional.

8. Is resetting the fault code enough to fix OBDII code P0066 in a Volkswagen?

Resetting the code may clear it temporarily, but it's crucial to diagnose and address the underlying issue to prevent it from reoccurring.

9. How much does it typically cost to repair OBDII code P0066 in a Volkswagen at a mechanic or dealership?

Costs can vary based on the specific repair needed, but it's advisable to get a few quotes from different service providers to compare prices.

10. What is the purpose of the air assisted injector in a Volkswagen and how does it relate to OBDII code P0066?

The air assisted injector helps with emission control and engine performance. When its control circuit malfunctions (triggering P0066), it can lead to issues with fuel delivery and combustion, affecting overall vehicle operation.