DTC Audi P1387 Short Explanation
Channel: Maxidot Audi
Date: 20/06/2020

The video focuses on the basic Audi diagnostic error code.
Contents:
0:21 Basic DTC analysis according to OBD2 protocol standard.
1:48 Insight into programming
- an explanation of what a bit is and how a byte is formed
- decoding the Error Code to the base programming
2:58 A diagnostically understandable description of the Diagnostic Trouble Code
3:05 Basic error definition
- Possible causes or errors of the car and its parts describing the mentioned error

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Make: 
Audi 
Code: 
P1387 
Definition: 
Internal Control Module Altitude Sensor Error 
Description: 
Ignition on, the ECM detected and altitude sensor error. To achieve optimal anti-theft protection for the vehicle, an anti-theft immobilizer is installed. The anti-theft immobilizer is a system for enabling and locking the Engine Control Module (ECM). So that this system cannot be circumvented, it is necessary to perform adaptation of the anti-theft immobilizer using the Vehicle Diagnostic and Information System VAS 5052 in the On Board Diagnostic (OBD) function. The great availability of equipment options makes it necessary to adapt the Engine Control Module (ECM) to the vehicle (e. g. throttle valve control module or cruise control system). This “writing” function is not possible with the generic scan tool. 
Cause: 
(If ECM was replaced) ECM ID not the same as the replaced unit
ECM has failed
Voltage supply for Engine Control Module (ECM) has shorted