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.
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HOMESERVICE MANUALSVOLKSWAGEN1999PASSAT SYNCRO SEDAN (3B2) V6-2.8L (AHA)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTESTING AND INSPECTIONMONITORS, TRIPS, DRIVE CYCLES AND READINESS CODESREADINESS CODE, FUNCTION DESCRIPTION
1999 Volkswagen Passat Syncro Sedan (3B2) V6-2.8L (AHA)
Readiness Code, Function Description
1999 Volkswagen Passat Syncro Sedan (3B2) V6-2.8L (AHA)SECTION 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.
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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.