Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Readiness code: Notes
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. Go to DIAGNOSTIC TROUBLE CODE (DTC) MEMORY, CHECKING AND ERASING .
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. Go to READINESS CODE, GENERATING .
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.