Readiness Code, Function Description

Readiness code

Function:
The readiness code is an 8 digit binary code that indicates the results of an exhaust related On Board Diagnostic (OBD).

Once On Board Diagnostic (OBD) has been successfully completed for a system (e.g. secondary air system), a 0 will be shown in the relevant position.

On Board Diagnostics are performed at regular intervals during normal vehicle operation. After repairing an exhaust related system, the readiness code should be generated to ensure that these systems are working according to specifications. If a malfunction is recognized during the diagnostic check, it is stored in DTC memory.

The readiness code is erased every time DTC memory is erased or when voltage supply is interrupted. DTC memory should therefore only be erased when there are DTCs stored.

When the Engine Control Module (ECM), throttle valve control module or electronic gas activation system is replaced on vehicles with automatic transmission, the kick-down shift position must be re-learned before regenerating the readiness code.