2021-2022 Audi Camshaft Position Sensor Emissions Service Action

Audi has initiated Emissions Service Action 24iO to address potential issues with camshaft position sensors in various 2021-2022 models, including the 2022 Audi Q8. This service action aims to resolve a condition where tolerance issues related to these sensors could result in elevated tailpipe emissions.

This proactive measure ensures that affected vehicles comply with emissions standards. Owners of a 2022 Audi Q8 or other affected models should schedule an appointment with an authorized Audi dealer to have this service action completed.

Why This Matters

The camshaft position sensors are critical components in your vehicle's engine management system. They monitor the rotational position of the camshafts, providing essential data to the engine control unit (ECU) for precise fuel injection and ignition timing. When these sensors experience tolerance issues, as described in Service Action 24iO, the engine's efficiency can be compromised, leading to increased tailpipe emissions.

While no direct owner-perceptible symptoms like warning lights or performance issues are explicitly noted in the service action, the primary concern is the vehicle's environmental impact and compliance with regulatory emissions standards. Addressing this issue through the installation of updated camshaft position sensors helps maintain your Audi's designed emissions performance.

What's Being Addressed

This service action specifically targets the engine camshaft position sensors, identified as G40 and G163. These sensors are responsible for accurately reporting the camshaft's position to the engine control unit. The repair involves replacing these sensors with updated versions designed to eliminate the tolerance issues.

Important Warnings for Owners

• Pre-Delivery Requirement: Dealers are mandated to ensure that every affected inventory vehicle has Service Action 24iO completed before it is delivered to consumers. If you are purchasing a new 2021-2022 Audi model, confirm this action has been performed.
• Safety Recalls First: If your vehicle has any open safety recalls, these must be completed prior to performing this emissions service action.
• Cooling System Safety: The repair procedure involves working with the cooling system, which can be under pressure. Technicians are warned about the risk of scalding from hot steam and coolant. Owners should be aware that proper safety precautions, including wearing protective gear and carefully reducing pressure, are critical during this repair.
• Pre-Existing Conditions: Diagnosis and repair of any pre-existing conditions in the vehicle that are unrelated to this service action are not covered under this campaign.

Repair Procedure Summary

The repair procedure for Service Action 24iO involves several steps to replace the camshaft position sensors G40 and G163. This process requires careful disassembly and reassembly of engine components, followed by bleeding the cooling system. Here's a high-level overview:

1. Preparation: The technician first removes the engine cover and the air filter housing to gain access to the sensors.
2. Coolant System Management: The right coolant pipes are removed from the longitudinal member. This step includes a critical safety warning regarding the pressurized cooling system and the risk of scalding. Technicians must wear safety gloves and eyewear, and carefully reduce pressure before proceeding. Rags or a catch tray are used to manage any coolant spills.
3. Sensor Replacement: The intake camshaft position sensors (G40 and G163) are then replaced. It is crucial to install the correct sensor in the correct bank: the white camshaft position sensor (G40) goes on bank 1 (right/passenger side), and the blue camshaft position sensor (G163) goes on bank 2 (left/driver side).
4. Reassembly: The new sensors are installed and torqued to 9 Nm. The coolant pipes, air filter housing, and engine cover are reinstalled in reverse order of removal, with coolant pipes also torqued to 9 Nm.
5. Coolant Fill and Bleed: The cooling system is refilled and bled using specialized tools like the Cooling System Charge Kit -VAS6096- to ensure proper coolant levels and eliminate air pockets.
6. Completion Label: After the work is finished, a Campaign Completion Label (CAMP 010 000) is affixed next to the vehicle emission control information label. It is important that this label does not cover any existing labels.

Required Tools and Parts

Authorized Audi service centers will use specific parts and tools for this service action:

• Repair Kit: 06M-998-601
• Coolant (U.S. ONLY): G-12E-050-1G DSP (up to 1.0 L)
• Coolant (CANADA ONLY): G-12E-050-2G DSP (up to 1.0 L)
• Bit Torx: T30 -T10573- (or equivalent)
• Cooling System Charge Kit: -VAS6096-
• V.A.G Tools: V.A.G 1274/8 and VAS 6096/1

Owner Action

If you own a 2021-2022 Audi vehicle, including the 2022 Audi Q8, that is subject to Emissions Service Action 24iO, you should contact your authorized Audi dealer as soon as possible to schedule an appointment. The repair, which involves installing updated camshaft position sensors, will be performed free of charge. The estimated time for the repair is approximately two hours, though additional time may be needed for dealer preparation and workshop scheduling.

California Emissions Requirements

For California vehicle owners, there are specific requirements for emissions-related campaigns. The California Air Resources Board (CARB) and the Department of Motor Vehicles (DMV) mandate that emissions campaigns be completed before vehicle registration renewal. Upon completion of Service Action 24iO, your dealer will provide a signed "Vehicle Emission Recall - Proof of Correction" certificate (RC EMISCAVWAU).

It is crucial to retain this certificate for your records. While it should only be mailed to the California DMV upon request, it serves as proof that the necessary emissions-related work has been performed on your vehicle.

NHTSA ID: 10233776