Readiness code

WARNING: This page is about a different car, the 2006 Audi A4, 2005 Audi A4, 2004 Audi A4, 2003 Audi A4, and 2002 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.

The readiness code appears as an 8-digit display on measured value block 086, display zone 1. Each of the 8 digits is allocated to a particular emission-related system.

The function of each of these systems is checked by the self-diagnosis and the relevant position for the system in the 8-digit display is changed from "1" to "0" in a test sequence which must be fully completed.

The readiness code produced after successful completion of the test sequence is then "0 0 0 0 0 0 0 0" (measured value block 086, display zone 1).

If an individual test has been completed, but is "not OK", a DTC is entered in the Diagnostic Trouble Code (DTC) memory. Checking Diagnostic Trouble Code (DTC) memory. Refer to Diagnostic Trouble Code (DTC) memory, checking .

The readiness code is reset to "0 1 1 0 1 1 0 1" if:

Diagnostic Trouble Code (DTC) memory has been erased,
Voltage supply to the ECM has been interrupted (e.g. the connector disconnected, battery disconnected).
A new Engine Control Module has been installed

Generate readiness code. Refer to Readiness code, generating .

NOTE: When driving with varying loads the exhaust relevant tests are initiated by the control module and the readiness code produces itself. In this case the concluding control possibility is omitted, i.e. it is not obvious whether the vehicle was handed over to the customer without any DTCs.