I just replaced my left side cat and secondary o2 sensor after my flexpipe broke. I used a CT Converter and a Bosche universal 4 wire 02 sensor. Now that the work is done, The engine wants to stall at start and rpms drop once I get to 1400 rpm. Is the ecu tripped up,isthethrottle messed up or do I need to replace the primary sensor?

Have codes read and post them.

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2001 A4 1.8T Q Casablanca White, Tip, ESP, Xenon and Premium

Car is a 99 b5 aha a4. code is



P1545
17953

Throttle position control malfunction.

Is this a part that needs to be replaced, or can it be recalibrated? I know a bit about cars, but this is a little over my head.

did you ever get the problem fixed im having the same problem