VW Touran Error Codes After Failed Drive Cycle Fix

Having dealt with a similar situation on my 2015 VW Golf, I can share some experience from a car enthusiast perspective with moderate diagnostic knowledge. The system readiness monitors often need completion after a computer reset or when the battery has been disconnected. My car showed similar symptoms until all drive cycle conditions were met. To resolve this, no workshop costs were involved as it just required following specific steps: 1. Used an OBD2 scanner to confirm the readiness status 2. Completed a proper drive cycle which included: Warm engine to operating temperature, Several acceleration and deceleration cycles, Highway and city driving conditions, Idle periods The system typically needs about 50-100 miles of varied driving to complete all readiness monitors. This is especially important if you need to pass an emissions test soon. Before suggesting more specific solutions, could you share: Which exact error codes are showing? Have you recently had any battery or electrical work done? What type of OBD scanner was used for car diagnostics? Are there any noticeable performance issues?

Just had my latest service at 31523km and facing the same readiness monitor issue. After following your drive cycle steps, my system still shows incomplete readiness status. The car runs smoothly with no performance issues, but my check engine light keeps coming on intermittently. Tried resetting with my basic OBD scanner but the readiness monitors stay unset. Planning to try a more comprehensive drive cycle before scheduling a vehicle inspection, since I know incomplete system readiness would cause an automatic emissions test failure. Currently evaluating if I need a better diagnostic tool or should just head to a workshop for proper troubleshooting.

Thanks for the update on your Touran situation. On my Golf, I initially faced similar persistence with incomplete readiness monitors even after multiple drive cycles. After further investigation, my basic scanner wasnt providing enough detailed information about which specific monitors remained incomplete. The intermittent check engine light you mention mirrors what I experienced. It turned out my exhaust system had a minor leak affecting the oxygen sensor readings, preventing some monitors from completing their tests properly. A few suggestions based on my experience: 1. Consider upgrading to a VW-specific scanner, basic OBD tools sometimes cant properly communicate with all system readiness monitors 2. Watch for specific driving conditions: Maintain steady speeds between 55-75 mph for at least 10 minutes, Include several cold starts without interruption, Complete 3-4 full warm-up cycles The car diagnostics revealed that sometimes seemingly unrelated issues can prevent readiness completion. While going to a workshop might seem costly, proper diagnostic equipment can save time identifying the root cause versus continuing with trial-and-error drive cycles. Would be helpful to know which specific readiness monitors are showing as incomplete on your scanner?

I still face the same readiness status problems after trying multiple drive cycles. My scanner indicates the EVAP and catalyst monitors remain incomplete. Looking at diagnostic codes DTC P0456 and P0420 appearing intermittently alongside the check engine warnings. Appreciate the detailed insights about the oxygen sensor correlation. This might explain why simply clearing codes and basic drive cycles havent fixed my OBD readiness. My basic scanner clearly isnt cutting it for proper car diagnostics. After weighing the time spent on trial-and-error fixes versus getting a proper vehicle inspection, Ive decided to schedule a workshop visit next week. Their professional diagnostic equipment should pinpoint if theres an actual component issue preventing system readiness completion, rather than just a monitoring problem. Will report back on whether they find any exhaust leaks or sensor issues similar to what you experienced. The intermittent nature of my check engine light definitely suggests something needs proper investigation beyond just drive cycles and basic scanning.