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Thanks, XXXXX XXXXX code is set due to a failed Cam Sensor - which you have already replaced. If the timming belt was off, even slightly, after it was replaced; than it would've been the cause. Since those two possibilities have been ellimianted, you may have a PCM (powertrain control module) failure, or the wiring to the PCM, from the sensor. You'll need to first verify the wires are good from the sensot to the computer by disconnecting the sensor and using an ohm meter to measure good continuity of each wire to the PCM's side. Also inspect the wires at the Cam Sensor connnector and harness. If the wires have rubbed through on any metal nearby, it'll cause the signal to short as well. if the wiring checks are good than the problem must lie in the PCM, and that is further issoalted with a factory level scan tool, where you can monitor the Cam Sensor data.
2003 Jetta left rear window blue plastic part of the