VIDEO

Informace

GMC

GMC P20BD

See the basic definition of a diagnostic error. This will help you to clarify the main causes of the fault code. You will understand the program of the control unit
Basic DTC analysis according to OBD2 protocol standard.

OBD2 or On-Board Diagnostics displays messages for basic group styles. More comprehensible code composition has been standard since 2000. The DTC code consists of five characters and its composition will be shown in this video

Insight into programming

The basic unit for the operation of any computer is the bit. Logic 0 and 1 are expressed by a single bit. Diagnostics The error code is composed of 16 bits. The first two bits define one of the four basic circuits. The video will show you a comprehensive overview of the composition of the error report

A diagnostically understandable description of the Diagnostic Trouble Code

GMC P20BD

Basic error definition

SCP Invalid or Missing Data for Function Read Vehicle Speed Diagnosis: If DTCs are present in the IC , DIAGNOSE those codes first. CLEAR the DTCs. If the HVAC DTC returns, INSTALL a new HVAC module. TEST the system for normal operation. If no DTCs are present in the IC , CLEAR the DTCs. If the HVAC module DTC returns, INSTALL a new HVAC module. TEST the system for normal operation.

Cause of DTC

no enought data