AutoCodes – Audi – P0066 Audi

P0066 Audi 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 Audi 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 5,904

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

What does this mean?

What are the Possible Causes of the DTC P0066 Audi?

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 Audi?

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 Audi 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 Audi code?

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

Need Help with the Code?

Get the P0066 Audi 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 Audi Code

1. What are the common symptoms of OBDII code P0066 in an Audi?

- Common symptoms include rough idling, poor acceleration, decreased fuel efficiency, and potential stalling of the engine.

2. What can cause the OBDII code P0066 to trigger in an Audi?

- The code P0066 is typically triggered by issues with the air assisted injector control circuit, such as a faulty air assisted injector, damaged wiring, or a malfunctioning control module.

3. How can I diagnose the cause of OBDII code P0066 in my Audi?

- To diagnose the issue, you can start by checking the wiring and connections related to the air assisted injector, testing the injector itself, and using a diagnostic scanner to gather more information about the fault.

4. Is it safe to continue driving my Audi with OBDII code P0066 present?

- It is not recommended to drive with the code present, as it can lead to further damage to the engine and affect the overall performance of the vehicle.

5. Can I repair OBDII code P0066 in my Audi myself?

- While some DIY enthusiasts may attempt to repair the issue themselves, it is recommended to seek professional help to accurately diagnose and fix the underlying problem causing the code.

6. How much does it typically cost to repair OBDII code P0066 in an Audi?

- The cost of repairing OBDII code P0066 can vary depending on the specific issue causing the fault. It is advisable to get a diagnosis from a mechanic to get an accurate estimate.

7. Are there any preventive measures to avoid OBDII code P0066 in an Audi?

- Regular maintenance checks, such as inspecting the air assisted injector system and ensuring proper wiring connections, can help prevent issues that may trigger the code P0066.

8. Can a faulty air filter cause OBDII code P0066 in an Audi?

- While a dirty or clogged air filter can affect engine performance, it is not a direct cause of the OBDII code P0066 related to the air assisted injector control circuit.

9. Will resetting the OBDII code P0066 clear the issue in an Audi?

- Resetting the code may temporarily clear the check engine light, but if the underlying issue is not addressed, the code is likely to reappear during driving.

10. How long does it take to repair OBDII code P0066 in an Audi?

- The repair time for OBDII code P0066 can vary depending on the complexity of the issue. It is best to consult with a mechanic to get an estimate of the repair time needed.