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vwnewton
vwnewton, VW Owner,ASE Master and L1 Advanced
Category: VW
Satisfied Customers: 307
Experience:  25 years of VW obsession turned into a job, last 15 years as a VW Tech.
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Have a 03 Passat with a bus code any thoughts on what might

Customer Question

have a 03 Passat with a bus code any thoughts on what might be wrong
engine start blocked by immobilizer p1570
Submitted: 1 year ago.
Category: VW
Customer: replied 1 year ago.
having communication issues with the modules with scan tool
Expert:  gomi_otaku replied 1 year ago.

Have you replaced any parts recently? This fault could be due to the keys not being matched to the immobilizer, or the ECM not being matched, or it could be that your reader coil (at the lock cylinder) is not reading the key correctly, or the wiring between the reader coil and the cluster, or between the cluster and the ECM is damaged. It's best if you have a factory scan tool or an emulator like Ross-Tech VAG-COM in order to be able to read value blocks in the cluster and ECM to see if they are communicating, and if the immobilizer is reading the coil at the ignition.