Readiness Calibration — OBD-II Monitors & Inspection/Maintenance Flags

Calibración de preparación is the TuningBot service that ensures proper handling and completion of the OBD-II readiness monitors (Inspection/Maintenance flags).
In an OBD-II compliant vehicle, readiness codes are represented by 8 (or more) bits, each corresponding to a specific emission-related subsystem.
When all bits show “Passed”, it means all onboard diagnostic tests have successfully completed and no active faults prevent readiness from setting.

What are readiness monitors

Readiness monitors are automated self-tests that the ECU runs under defined conditions of speed, load, temperature, and fuel level.
Each monitor tracks a specific subsystem — for example catalyst efficiency, oxygen sensors, EVAP leak detection, EGR flow, or secondary air injection.
Once a monitor completes its test without triggering DTCs, its bit changes from Not Ready to Ready.
Some monitors are continuous (e.g., misfire, fuel system), while others are non-continuous and require specific driving conditions or cycles to run.

When Readiness Calibration is useful

• After ECU tuning or hardware modifications that may alter monitor logic (downpipe, decat, EGR delete, sensor upgrade).
• When readiness bits remain Not Ready even though no DTCs are present and proper drive cycles were completed.
• To restore or align enabling conditions after partial monitor deactivation or code mismatches.
• To reduce the time and number of cycles needed for monitors to complete successfully.

What the service includes

• Review and correction of enabling conditions for all non-continuous monitors (EVAP, O2, catalyst, EGR, secondary air, etc.).
• Adjustment of thresholds and dependencies to ensure each monitor completes correctly under standard conditions.
• Verification of cross-link logic between related tests (e.g., O2 vs. Catalyst, EVAP vs. fuel level/temperature).
• Bench and dyno validation with reference drive cycles to confirm readiness completion.

Recommended procedure

1. Start with a stable or stock ECU file; clear all fault codes and adaptations.
2. Verify correct operation of all sensors and actuators relevant to emission systems.
3. Flash the Calibración de preparación file and perform a full monitor reset using your diagnostic tool.
4. Execute the OEM-recommended drive cycle (temperature, speed, stops, deceleration phases).
5. Check readiness bits and confirm completion before inspection or emissions testing.

Legal & technical notice

This calibration is intended to assist in monitor alignment and validation. It must not be used to disable or falsify emission-related functions where prohibited.
Mechanical faults or inactive systems (e.g., removed catalysts or EGR hardware) must be repaired or re-enabled to achieve legitimate readiness completion.
Local regulations define which monitors are mandatory for inspection; compliance remains the user’s responsibility.

Readiness_Calibration — Supported ECU

*** If your ECU is not listed, please contact TuningBot support — custom enabling condition analysis and drive-cycle recommendations are available on request.