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1. What Does “No Readiness Option VCDS” Mean?
The “no readiness option VCDS” message indicates that your vehicle’s On-Board Diagnostic (OBD) system hasn’t completed all the necessary self-tests, making it fail the emissions test or preventing certain features from functioning correctly. The VCDS (Vag-Com Diagnostic System) is a diagnostic tool that can be used to read, check and reset fault codes in Volkswagen and Audi vehicles.
The readiness option, in VCDS, checks the status of various system monitors to determine if they have run and passed their self-tests. These monitors include:
- Misfire Monitor: Detects engine misfires.
- Fuel System Monitor: Checks the fuel delivery system.
- Comprehensive Component Monitor: Monitors various electrical components.
- Catalyst Monitor: Evaluates the catalytic converter’s performance.
- Heated Catalyst Monitor: Checks the heated catalyst system.
- Evaporative System Monitor: Monitors the evaporative emissions control system.
- Secondary Air System Monitor: Checks the secondary air injection system.
- A/C Refrigerant Monitor: Evaluates the air conditioning refrigerant system.
- Oxygen Sensor Monitor: Checks the oxygen sensors.
- Oxygen Sensor Heater Monitor: Monitors the oxygen sensor heaters.
- EGR System Monitor: Checks the exhaust gas recirculation system.
If the readiness status is not set, it means that one or more of these monitors haven’t completed their tests. This can be due to various reasons, including:
- Recent Fault Code Clearing: Clearing fault codes resets the readiness monitors.
- Interrupted Drive Cycles: The drive cycle, which is a series of driving conditions required to run the monitors, may have been interrupted.
- Underlying Mechanical Issues: Problems with the engine, fuel system, or emissions components can prevent the monitors from completing their tests.
- Incorrect Coding: Improper coding of the ECU can affect the operation of the readiness monitors.
- Software Issues: Software glitches in the ECU can sometimes cause readiness monitors to fail to complete.
