VIDEO

Informace

Chrysler

Chrysler B21A1

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

Chrysler B21A1

Basic error definition

Manifold Pressure-Barometric Pressure Correlation

Cause of DTC

The Powertrain Control Module (PCM) performs the following rationality tests to check the Manifold Air Pressure Sensor and Barometric Pressure Sensor: At PCM power-up, the manifold pressure is compared with barometric pressure. If the two do not correlate and it cannot be determined which sensor is faulty, then this code is reported.